McMaster-Carr part number 8560K181 Optically Clear Cast Acrylic Sheet, 3/32" Thick, 12" x 12" (about 5 $bucks) You can use larger one for extended version. Drill .109 dia hole and tap for 6-32 thread 1/2" from top approx 1" from side edges. Print STL file, and attach to sheet. DONE! that easy. Move the door to the sides when clearing table. (see pictures - on and off)