I vendored that on accident a while back on this guy and just noticed it. It there anyway to restore it to him without waiting hours on end for a in game GM to help me?

The following response was written by one of our new teammates. Because they are still in training and do not yet possess a forum account of their own, they shall be posting via proxy through me.

The best way to recover an accidentally destroyed, vendored, or disenchanted item is via in-game petition Dreadhorn. I do very much understand the frustration with waiting in queue to speak with a Game Master, but your patience is most appreciated. We work to address all petitions in the order they are received, and do so as quickly as possible. In your ticket, be sure to give the name and realm of the affected character, as well as the item that was lost and the relative time frame. This will give the receiving Game Master all the information they need to assist as best they can.