My father left me a 68 Sonett V4. He was the one owner of this car, I’ve watched him deal with the whims of this automobile my whole life so I have an idea what I’m taking on. The rear window is broken. From what I’ve gathered online they are nearly unobtainable as glass? Plexiglass ones are obtainable? If one wanted a glass one what would I expect to fork out? I’ve searched online to try and see if one ever came up and what it went for but have been unsuccessful. The one in it is an Arva, I assume those are unavailable? Any direction or info much appreciated.