Where do u buy sheets of plastic mirror used in magic that are about 5 feet by a little over 2 feet?
Builder's Square (now out of business) used to carry them. I bought some and attached them to a three-panel screen to use when I practiced tap dancing. Home Depot and Lowe's carried them at one time in their plexiglas sheets department, near the hardware, and in their ceiling panels department, near the lighting. If you have a Sutherlands Lumber near you, you might check with them.