I can't find the thing anywhere, and I'm desperate to finish the related quest. I have other items from the lab, but not this one.
I'm not sure is a savegame will do. Here is a guide to inventory tricks
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=40716&an=. If you have a savegame with the item, please send me you inv file)