From XYZDesignPro: I used .090 Lexan for the door. Available at Home Depot pre-cut to 12" X 18" size. The door is 12" X 15½". Just cut 2½" from one end and you're good to go. Screws go directly into the Lexan. They will tap their own threads with a good power screw driver, if just the right hole is drilled, eliminating the need for nuts. Best to glue the handle in place.