Welcome to the boards, Tom Kartes! May the goblins sign their own death notices when they hear your name...
How in the devil did you "accidentally" kill him in the first attack? :? I'm really curious, because he gave me a devil of a time, and killed me at least once along the way.
In any case, I don't know if anyone has hacked the game yet to be able to "retrieve" missing inventory items. If you didn't follow Momma Hissy's advice and save early and often, and especially before, then I don't think I have good news for you...
Perhaps someone else has a few more thoughts on the matter. And while they're thinking, what kind of character are you playing that's dealing out that kind of damage?