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
You need to start a wanted thread. That's how we do things around here. Thanks