3 replaced glass windshields later in my Lister, I went to polycarbonate (aka Lexan) and have not looked back. Its been on the car for 3 plus years now and I have not had any issues, even with scratching. It has even taken some pretty good hits at the track on occasion.
I bought a 4'x8' sheet (not scratch or UV resistant) for around $100 at Laird Plastics in downtown Phoenix and just used my old cracked windshield to make a poster board template and then cut it with a jigsaw. I figure I can also cut another 3-4 windshields out of what remains if it ever gets scratched.
Every vehicle I have owned in the 35 years I have lived here has had multiple windshields, I think the rocks must be softer down in Tucson.
