SimbaLux Acrylic Sheet Clear 4 x 6 Panel 0.04 Thick 1mm Plexiglass Board, Easy to Cut, Pack of 10 - Walmart.com
Amazon.com - Egofine 12x12 Picture Frames White, Wood Frames with HD Plexiglass for Pictures 8x8 with Mat or 12x12 without Mat, Wall Mounting Display, Set of 4