Here is complete list of tanking gear that our tanks should strive for in order to tank for end-game. If I miss anything, please let me know.
Head
Gyth's Skull of <random resist> - http://www.thottbot.com/?i=19206
(Try to aim for Shadow or Fire Resist, if you're lucky, but any resist will do at this time)
Neck
Evil Eye Pendant - http://www.thottbot.com/?i=35743
Medallion of Grand Marshal Morris - http://www.thottbot.com/?i=10553
Shoulders
Stockade Pauldrons - http://www.thottbot.com/?i=9980
Stoneform Shoulders - http://www.thottbot.com/?i=19799
Bulky Iron Spaulders - http://www.thottbot.com/?i=35751
Back
Redoubt Cloak - http://www.thottbot.com/?i=36081
Cloak of Warding - http://www.thottbot.com/?i=35977
Chest
Ornate Adamantium Breastplate - http://www.thottbot.com/?i=17848
Enchanted Thorium Breastplate - http://www.thottbot.com/?i=37666
Deathbone Chestplate - http://www.thottbot.com/?i=18831
Bracers
Bracers of Heroism - http://www.thottbot.com/?i=53156
Runed Golem Shackles - http://www.thottbot.com/?i=19981
Fel Hardened Bracers - http://www.thottbot.com/?i=37376
Gloves
Stonegrip Gauntlets - http://www.thottbot.com/?i=38415
Boneclenched Gauntlets - http://www.thottbot.com/?i=19030
Belt
Belt of Heroism - http://www.thottbot.com/?i=53154
Deathbone Girdle - http://www.thottbot.com/?i=18296
Legs
Legplates of the Eternal Guardian - http://www.thottbot.com/?i=8477
Deathbone Legguards - http://www.thottbot.com/?i=19366
Legplates of Heroism - http://www.thottbot.com/?i=19366
Feet
Deathbone Sabatons - http://www.thottbot.com/?i=21991
Rings
Nagelring - http://www.thottbot.com/?i=5297
Band of the Steadfast Hero - http://www.thottbot.com/?i=53323
Drakeclaw Band of <random enchantment> - http://www.thottbot.com/?i=53323
Hardened Stone Band - http://www.thottbot.com/?i=37379
Ring of Defense - http://www.thottbot.com/?i=4183
Trinkets
Force of Will - http://www.thottbot.com/?i=5163
Stormpike Insignia Rank 6 - http://www.thottbot.com/?i=40558
Royal Seal of Eldre'Thalas - http://www.thottbot.com/?i=38395
Arena Grand Master - http://www.thottbot.com/?i=40294
Shield
Draconian Deflector - http://www.thottbot.com/?i=18989