PVC FOAM BOARD KOMATEX, SINTRA, SHEET WHITE 1/8" x 48" x 24" | eBay
Amazon.com : Union Premium Foam Board 24 x 36 x3/16" 10-Pack : Matte Finish High-Density Professional Use, Perfect for Presentations, Signboards, Arts and Crafts, Framing, Display (Black/White, 24 x 36 x 3/16") :