We sell a 4x8x1/4 sheet of clear for around $140. I work for a sign supply distributor. Lowes or Home Depot will be much more than that for that size. You can also get the glue at a sign supply distributor or plastics distributor. Just google sign supplies or plastics distributor in your area.ok its def. not $15 lol. Went to lowes today and a piece about 1/8" x 36" x 72" was $45.