Neither the looks or stats of these shoulders is impressive but decent.
Drops off Patchwerk in Naxx, the item needed for it does anyway.
Drops off Grobbulus, Gluth AND Patchwerk, in the Abomination wing of the raid instance, Naxxaramas.
Does anyone else think this resembles this? I do.
As of 5.0.4 in MoP beta this will be obtainable through the black market auction house.