• 20mm Extrusion 2 ft piece (McMaster #5537T104) x 2 pieces
• 20mm Extrusion T-nuts (McMaster #5537T154) x 4 bags of 4
• Flange Button Head Cap Screw, M5 Size, 8 mm Length, 0.80 mm Pitch (McMaster #92137A412) x 1 bag
• 20mm Extrusion 90 Degree Bracket, Single, 2-Hole (McMaster #537T181) x 4 pieces
• 20mm Extrusion endcap (Mcmaster #537T14) x 4 pieces
• Clear Cast Acrylic Sheet, .060" Thick, 12" X 24" (Mcmaster #8560K172) x 1 piece

Total is $50

Cut the 20mm extrusion into ~18" pieces (make them a little shorter than the pick and place drawer.

Attach the pieces with L-brackets so that the L-brackets face each other on the inside of the holder and the outside right edge is flush with the drawer.