Amazon.com : WOT I Heavy Duty Plastic Folders with Pockets and Prongs - 6 Packs, Extra Thick Pocket Folders with Brads/Card Slot, for Letter Size Sheets, Bright Colors School Work and Home :
Plastic Diamond Plate Wall Protection By InPro®
PLASKOLITE 0.157-in T x 48-in W x 96-in L White Corrugated Plastic Sheet in the Polycarbonate & Acrylic Sheets department at Lowes.com