There isn't much strictly tanking gear.
Crystal infused Tunic, heroic Nexus
Slag Footguards, Heroic HoL
Bile Cured Gloves, Heroic CoS
Mask of the Watcher, Heroic Occulus
Shroud of Darkness, Heroic VH
Legguards of Swarming Attacks, heroic OK
Sprinting Shoulderpads, heroic OK
Spaulders of the Careless Thief, heroic Nexus
Treasure Seeker's Belt, heroic AN (BoE from trash)
Bindings of the Tunneler, Heroic UtK
Most tanking gear is good for DPS, and vice versa. The BC days of things like the Heavy Clefthoof set are gone.
Oh, and the epics off the last boss.
Sharp-barbed leather belt, heroic UtK
Gored Hide Legguards, heroic Gundrak
Gilt Edged leather gauntlets, heroic UtP
Plus badges gear, ToC 5 normal and heroic...
Someone should make a pre-raid gear list if there isn't already one floating around here somewhere.