Materials:
3/4 x 49 x 97 S11 White Thermally-fused Melamine
~$38.00 per sheet. Cutting is free at Home Depot, so have it cut there. (1 per enclosure)
They sell a 24"x48" piece of clear plexi glass at my local HD as well.
~$25.00 a sheet. (1 per enclosure)
Grip-Rite #6 x 1-5/8 in. Fine...