http://www.torhead.com/item/e1GcRIP/elder-vindicators-handgear#comments
Dropped by Highmount Ridge Wampa
X:-911, Y:514, Z:168 is the map location for Highmount Ridge, where you'll find two Young Wampa, a security chest, and a corpse. Killing the two Young Wampa summons the Highmount Ridge Wampa.
Another comment says "Dropped by Kazianna Alvamma." which is (Glacial Fissure, Terror Brigade Compound, approx X:1131, Y:125)
Good luck hunting.