Source for replacement fastback cuda rear window?

Hello all, in the process of tinting the glass on my '69 we discovered numerous little imperfections from grinding or welding, they embedded into the glass and show up as light spots when tint is applied. So I'm wondering about replacing the rear window glass. Does anyone still make that piece, or would I need to locate a good used rear one

Classic Auto Glass - Windshield Glass, Back Glass, Door Glass, Vent Window Glass and Quarter Window Glass - Plymouth Barracuda, 1964, 1965,1966, 1967, 1968, 1969, 64, 65, 66, 67, 68, 69 - Catalog Product List Page