Glass threads on here are common, ANY glass shop should be able to cut and fit laminated glass, take them a pattern, easy to make, and cheap. I have no idea why this is a big deal, been building 40 years, been to several glass shops that are happy to make windows for an old car, it's something out of the ordinary for them. Give your local guy your money.
Ya know... cutting glass isn't that hard to do, esp new laminated glass. Don't bother trying to cut tempered, it'll all fit inside a very small bag. Old glass can be wonky, & decide it's gonna run where it wants to when cut. Cut the glass on an old piece of carpet, it works to help hold the glass from sliding & protects it while you abuse it. Pattern, a good glass cutter w/new wheel, light oil, alcohol n razor blade. For sanding the edges, if you have a belt sander, use it, but use a light touch. I've found a DA w/wet-or-dry sandpaper works very well. Keep the paper n edge wet. Smooth in no time. Messy, but that's what they make soap n water for. No DA? Then paper n block gets the work done, just slower. Only thing I really didn't like about cutting glass was the glass-slivers. Harder to deal w/than either wood or metal. Marcus...
I remember seeing one of these in a local shop that was in business for three generations before selling out to a national chain. After that is was no more small orders, special orders, the only auto stuff they did was windshield replacement
Glass, these cars had a glass windshield with plexiglass side windows, some even had rear plexiglass. All they did was go fast in a straight line and weren't designed as daily drivers. This was on a restored later T'bolt, I don't think it's original though.