First do /isearch crag to make sure you haven't misplaced it. Otherwise, from my own experience:

I contacted Customer Support in game back in HW when I accidentally traded in one of my pink items from old Diadem that had really good stats.

I received a reply, still in game, that they could do a ONE TIME ITEM RESTORATION per account. After taking that information in I elected not to restore the item though, figured I'd save it in case I accidentally deleted something I was keeping for glam that would be hard to replace.