I agree with Hombre 100% - a good local glass shop can cut flat auto glass, polish the edges and have you fixed up with no problem. One tip is to make your patterns from a good rigid material, like masonite or tempered masonite, and lable them inside/outside, top/bottom to keep any glass ID info right side up and outside. I had one cut years back and ended up with a faint PPG logo upside down on the back top corner - not a big deal, but why???