Allright. After guiding many druid friends and randoms I have decided to make a Feral Druid Preraid Tank Gear guide. This is for guidance and future references. Note that using Atlas Loot, Leatherworking crafts, checking Heroic Badge rewards and using common human intellect will equal the information yielded here.
[Stylin' Purple Hat] Leatherworking
[Necklace of the Juggernaut] Vendor (25x Heroic Badges)
[Shoulderpads of Assassination] Sethekk Halls
[Thoriumweave Cloak] Mechanar
[Heavy Clefthoof Vest] Leatherworking
[Veteran's Dragonhide Bracers] Vendor (11.794 Honor, 20 WSG Marks)
[Wastewalker Gloves] Shattered Halls
[Tree-Mender's Belt] Hellfire Ramparts (Heroic)
[Heavy Clefthoof Leggings] Leatherworking
[Heavy Clefthoof Boots] Leatherworking
[Ring of Unyielding Force] Vendor (25x Heroic Badges)
[Ring] Will be updated when I find it again (180 armor something, tips?)
[Insignia of the Horde]/Alliance or
[Medallion of the Horde]/Alliance
[Trinket] Something useful for tanking, meh.
[Idol of the Wild] or
[Idol of Brutality]
[Earthwarden] Vendor
Now it's raid time, and I will add some features such as Enchants, reputation and etc later.