About 6 or 7 years ago I bought some lightweight glass for my dart from "Wild Bill Collett" (not sure if thats the proper spelling on his last name) he races a hemi Barracuda. At the time he was having the lightweight glass manufactured and had several sets for sale. I do not know if he still sells it or even how to get ahold of him but it might be worth a try if someone wants it bad enough.