This isn't a comprehensive guide to getting gear for a soloing Feral Druid, but this is a list of what I've managed to put together for my Druid, almost completely solo. It does include some PvP gear, but it was gotten mainly from Wintergrasp where it is quite easy to just join, do your thing, and never have to deal with talking to anyone else, and reap the rewards.
HEAD: Titan-Forged Leather Helm of Triumph is sold in Wintergrasp for 40 Wintergrasp Marks of Honor. Besides looking like Hannibal Lector, this is about the only helm available that I could find that has a meta-socket in it(aside from engineering goggles). Mine is socketed with the Relentless Earthsiege Diamond and a +16 agility gem. Also a must is the Arcanum of Torment, sold by the Knights of Ebon Blade quartermaster at revered.
NECK: Hateful Gladiator's Pendant of Triumph, which was easily obtained while doing Wintergrasp, as the quests and just participating give you tons of honor. There are other versions(as well as newer versions I think by now) that give different stats-I honestly can't say why I chose this one. I could have had my jewelcrafter make me a Titanium Impact Choker, but I had the extra honor, so why not.
SHOULDERS: Trollwoven Spaulders, made by my friendly neighborhood leatherworker(my husband!). I have the lesser enchant from Sons of Hodir right now, I forgot to buy the higher one when I got exalted and haven't bothered to go back up there since then.
CHEST: Polar Vest, also made by a leatherworker. This one is more of a tanking chest, but right now it's either this or the Eviscerator's. I am working towards the Darkheart Chestguard, available at exalted with Knights of Ebon Blade, but I need at least another week of dailies to get it. Enchantment is Super Stats, which could be better, but I don't want to do anything until I get the Ebon Blade chest.
CLOAK: Ice Striker's Cloak, made by leatherworker. Enchanted with Major Agility.
WRIST: Hateful Gladiator's Wristguard of Triumph, another item I snagged while doing Wintergrasp for a minimal amount of honor. I have them enchanted with Striking.
HANDS: Eviscerator's Gauntlets, made by leatherworker. Enchanted with Assault. I've thought about doing more Wintergrasp to get better gloves and legs, but I get burnt out on it rather quickly, and I just haven't found better gloves right now.
WAIST: Trollwoven Girdle, made by leatherworker. And shame on me, I haven't gotten around to socketing it yet. Soon.
LEGS: Chain Gang Legguards, which I got by fishing up the Rusty Prison Key and opening the lockbox under the water in front of Violet Hold. Right now I only have a Jormungar Leg Armor on them. I'm sure if I ever manage some epic legs, I'll get an epic armor kit for them.
FEET: Boots of the Neverending Path, which are obtained from Argent Crusade at exalted. These are really nice, I have them on my rogue also. I have them enchanted with Superior Agility.
RINGS: Etched Band of the Kirin Tor, which I just upgraded to this morning. Not bad for the cost(once you get over the cost of the first one!).
Titanium Impact Band, with a +16 agility gem. And since I'm an enchanter, I have enchanted both of my rings with Assault.
TRINKETS: Oracle Talisman of Ablution, from exalted with the Oracles in Scholazar Basin. The only hard part in getting exalted is getting past the group quest in which you choose who you want to do quests for-and I did that with my husband and daughter, so it wasn't too bad. You do have to stay exalted with them to use it, so I haven't bothered to switch sides and work on Frenzyheart rep, even though I already got my Green Proto Drake.
Coren's Chromium Coaster, which came from the Brewfest boss-which admittedly took a 5man group to do, but it was truly painful as we(husband, daughter and I) ended up with a couple of jerks in our group.
I suppose I could buy some of those Darkmoon Decks from the Auction House, or PvP for some more trinkets, but I'll deal with these for now.
IDOL: Deadly Gladiator's Idol of Resolve. I only got this recently when the items in that slot for Druids, Paladins, Shaman and Death Knights finally became available for only honor points. Previously you had to upgrade your old quested Idols with Arena points or through dungeon emblems. I was quite happy with this little upgrade.
WEAPON: Titansteel Destroyer, made by a blacksmith(for me it was another of hubby's alts). Very nice item if you can get your hands on it. There is a staff available with Champion's Seals at the Argent Tournament, but if you already have this, that one isn't an upgrade. I have it enchanted with Greater Savagery.
Even with all of that purple, my gear score on Wow-heroes is only 2013(which wouldn't even get me into an Onyxia run with my guild on a different server) and my dps(per recount) sits at around 1400. I'm sure there is something I'm not doing right, but as long as it works while I solo my way through Azeroth, I'm happy with it.