64 Dart rear windshield question???

In my search for a 63 Rear window gasket..I was told by 10 different suppliers that the 65 rear window is NOT the same as the 63,64..They told me that there was a difference between hardtop and sedan rear window..GO FIGURE THAT !!!! also the rear door panels on a 64 GT Hardtop wont fit 63 Sedan rear panels..now i am really confused...But i did find everything else for my car..window sweeps,door weather strippings,body bumper kits,door handles,bezels and lenses.. only need the trim pcs on the bottom of my truck lid and rear window weather stripping.. HELP>>>>>>>> [email protected]