Adding Firebird OEM door cup holders

I found out awhile back that the 3rd gen Firebirds had a cup holder/map holder option that mounted to the doors.  Since our cars share pretty much every part, I figured these would mount right up to my doors.  So I took a chance and ordered a pair of OEM cup holders off of Ebay for third gen Firebirds. Then took off the door panels and found the holes where these mount.  I used License plate mounts to screw these into.  

I did have to drill some holes into my door panels, but I think it was worth it since these turned out pretty nice.  Very easy overall to add these.

I never really understood why GM always gave all the options to the Firebirds but the Camaro never got anything. Even though they share all the same parts.