One workaround might be to set it as an quest item so it can not be dropped and do equipitem if onunequiped is called. However I don't find an way to turn the quest item flag on and off, has to exist as it's done many times in the game.
However I don't find an way to turn the quest item flag on and off, has to exist as it's done many times in the game.
Is in here: http://www.creationkit.com/Quest_Alias_Tab look for "Quest Object" and as you can see it provides aditional functionality. Didn't test myself, just noticed it.