Amazon.com: Icona Bay PET Plexiglass, Thin & Flexible Plastic Sheets (4x6 x 0.03 inch, Clear, 10 Pack), Easy to Cut for DIY Art Projects, Picture Frame Replacement Glass, PET Sheeting is Pliable
Amazon.com: Gartful 5x7 inch Clear Plexiglass Sheet-0.04"(1mm) Thick, Acrylic Square Panel with High Transparency for Signs, DIY Display Projects, Craft, Picture Frame, Storage Box, Pack of 10 : Industrial & Scientific
Enoin 4pcs 3 x 3 Inch Clear Acrylic/Plexiglass Sheet 0.080" 1/12 Thick, Plastic Sheet Transparent Board Panel for Glass, DIY Project,Picture Frame,Paintings, Art Craft: Amazon.com: Industrial & Scientific