Fastback glass has the stainless trim/seal on the door glass, notchback and conv have it on the rear side glass.
Fastback and notchback side glass is completely different, even if one ignores the trim/seal location.
Convertible rear side glass is not the same as Fastback or notchback.
Convertible door glass could maybe pass for Fastback, I doubt it, but with the different location of trim/seal I'm betting not the same.