Palight ProjectPVC 24 in. x 48 in. x 0.236 in. Foam PVC White Sheet 159841 - The Home Depot
2Pcs 300x400mm White PVC foam board Model making material plastic flat board For DIY Building model materials - AliExpress
Expanded Foam PVC - Polymershapes
Expanded PVC Foam Sheets | Acme Plastics
5 Sheets White Foam Boards--Sand Table Building Model Materials 2mm / 3mm Thick Foam PVC Sheet Poster Board Mount Board for Mounting, Crafts, Modelling, Art, Display, School Projects - Walmart.com
Amazon.com: Expanded PVC Foam Board, White, 3/4" (0.75", 19MM) Thick, 12" W x 24" L : Industrial & Scientific