Don't buy a cheap one, it won't last, it'll scratch, fog, and break...spend the money for a good one the first time, or, you'll be spending money a second and third time to replace them... ...as per Tman's link, call ProGlass...they have pre-molded windshield's, (bending a flat piece to fit in a curved opening like a '55 Chevy does NOT work!), in 1/8" & 3/16" thickness, and, they apply a scratch & solvent resistant coating... I deal with this everyday at work...it's the only company we use for Lexan in our race cars...