Hello Yosharian,
Have you checked to see if you sold it to an NPC? All items you sell to NPCs remain in their inventories forever. Also to generate "lost items" I don't think any of those commands are publicly available. There are no ways to generate lost items in older Divinity games with the exception of the Divinity 2 the Developer edition.
Also ignore Hiver's purely negative comments, he is our resident 'unemployed' troll. The Troll King fired him since he can't count his money from his TROLL TOLL. People were giving him 15 gold instead of 150 to cross his bridge...rather embarrassing isn't it?
