Amazon.com: BuyPlastic Black Expanded PVC Plastic Sheet 10mm (3/8") Thick, Size 12" x 12", Polyvinyl Chloride Foam Board Actual Dimensions - 11.75 in x 11.75 in : Industrial & Scientific
Amazon.com: Aicosineg PVC Foam Board 3mm(1/8") x 15.75" x 23.62" Expanded PVC Sheet Lightweight Rigid Foam Plastic Board Ideal for Signage, Displays, Durable Plastic Sheet Waterproof for Outdoor-Grey(2PCS) : Industrial & Scientific
Amazon.com: Aicosineg PVC Foam Board 3mm(1/8") x 15.75" x 23.62" Expanded PVC Sheet Lightweight Rigid Foam Plastic Board Ideal for Signage, Displays, Durable Plastic Sheet Waterproof for Outdoor-Blue(2PCS) : Industrial & Scientific