OPTIX 24 in. x 36 in. x 0.177 (3/16) in. Green Edge Acrylic Sheet 25529102 - The Home Depot
Fab Glass and Mirror Fab Glass And Mirror Rectangle Acrylic 24-in length X 48-in width Plexiglass Clear Sheet in the Polycarbonate & Acrylic Sheets department at Lowes.com