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
3/8" White Acid Free Buffered Foam Core Boards : 10 X 10 - BOXFORLESS.COM
Elmer's 3pk 16" X 20" Foam Presentation Boards - White : Target
InSite Reveal | Foam Board | Laird Plastics
Matte White PVC Foam Boards - 5mm or 10mm Foamex - Signage and Mounting - SALE | eBay