I wanted to do them before I did the research. I found a guy on this forum claiming to be making them. I made the mistake and prepaid. Got ripped off for the money.
So I did more research and found a guy who makes custom autoglass. He ended being the guy on overhaulin that does all the auto glass for foose. I brought him the old quarter windows glass only all the other junk removed and a cardboard template of opening in the car.
He found a windshield that had the same shape of the old quarter glass. He cut the quarter glass out and painted the black outline. Then it was glued in with windshield glue. Easy peasy.