Convertible backlite need replacement

[gtcs1]

Hi all, my rear glass on my 73 convertible is disbanded a few places from the zippered liner. It’s too bad since the glass is in perfect condition.

P.O. used some silicone but this doesn’t work well (leak) and looks ugly.

Is there a mfg that makes them with the zipper around so I could replace this rear portion. Color of top is black. Is the fit good (really interchangeable) if that aftermarket part exist. And who would be the best manufacturer?

Thanks