Palruf 26 in. x 12 ft. White PVC Roof Panel 101339 - The Home Depot
Corrugated Plastic Sheets, Sheets 4'x 8', corrugated black sheet, set shop
Coroplast Plastic cardboard 0.157-in T x 24-in W x 36-in L White Corrugated Plastic Sheet in the Polycarbonate & Acrylic Sheets department at Lowes.com