Any hardware store sells plexiglass in 1/8" sheets cut to size, you could get a 12 x 12, 24 x 24 or whatever size you want and buy the knife that scores it, and cut it down to size yourself. Unless you have a tablesaw like NICK & myself have then acrylic is the way to go! This can also be cut with a circular saw, or band saw, band saw is kind of slow and circular saw unless you use clamps and a straight edge or are really good with will not come out even. TMI. If they do not sell the knife check Walmart or similar store, or I have them too (the knives).