This is the cloest I could get to the final boss in The Deadmines, the legs that the boss wears are cloth, and so would not be able to be transmogged, and also the Red Defias Mask is a grey item, and at this moment in time I don't know if it would be available.
Warbear Woolies
Razorfury Mantle
Black Featherlight Boots
Bloodfang Gloves
Vancleef's Breastplate of Conquest
Tabard of Flame
Bloodfang Belt
Sunroc Mask
