Amazon.com : Royal & Langnickel 32 x 40" Double-Sided White Foam Board, 10 Sheets : Office Products
Gator Board - White 32"x 40"x 0.5" (1) | eBay
Self Adhesive White Foam Core Board 3/16" 32" X 40" - Delta Art
FOAM BOARD WHITE 32X40 1/8' - Hull's Art Supply & Framing
Gilman Clay Coat White Foamboard 32x40 1/8" (25/box) F3240/8 Paper-faced memory foamboard with the proprietary Reveal® foam center. Smooth bright-white clay coated paper engineered to retain its thickness during mounting, laminating, screen-printing
Foam Board White 1/8in 32x40 (Box of 25) | plazaart.com