Amazon.com: PERFORMORE 10 Pack of 5" x 7" PETG Sheet Plexiglass Panels - 0.04 inch Thick Clear Polystyrene Plastic Sheet Ideal for Crafting Projects, Picture Frames, Cutting and More with Protective Film :
EverGreen 9006 Clear Polystyrene Sheet 150 x 300 x 0.25 mm (Pack of 2) : Amazon.co.uk: Toys & Games