1992 Firebird Convertible Window

I'm not sure if anyone can help me, or if I'm posting in the right spot, but I have been searching everywhere I can possibly think of to find just the window on a 1992 Pontiac Firebird convertible! Any suggestions would be greatly appreciated and the sooner the better!

FYI... it's not for me personally. I work for a Pontiac dealership and I'm just trying to help them out! :)

Please and thank you!!