WTB: Fixed rear door glass, Dart/Val 4dr pass.side.

I have a 1971 Valiant 4dr that I need the small, fixed rear door glass for, on the passenger side. I assume they are interchangeable Dart to Valiant, possibly 1967-1976? I do have the original gasket but I fear that it has shrunken/deteriorated since the glass has been gone (shattered) for years. Thanks in advance!