Coroplast Plastic cardboard 0.157-in T x 24-in W x 36-in L Black Corrugated Plastic Sheet in the Polycarbonate & Acrylic Sheets department at Lowes.com
Corrugated Plastic Sheets | Rapid Packaging
48" x 24" Corrugated Plastic Sheets - Short Flute White - USCutter
Falken Design 12 in. W x 36 in. L x 0.25 in. T Clear Twin Wall Polycarbonate Sheet MW-CL-1-4/1236 - The Home Depot