OPTIX 0.22-in T x 48-in W x 96-in L Clear Acrylic Sheet in the Polycarbonate & Acrylic Sheets department at Lowes.com
Amazon.com: (2 Pack) 1/8" Thick Clear Acrylic Sheets - 24" x 36" Pre-Cut Plexiglass Sheets for Craft Projects, Signs, Sneeze Guard, and More - Cut with Laser, Power Saw, or Hand Tools :
Lexan Sheet in Hawaii - Polycarbonate - Min Plastic