Amazon.com: White EVA Foam Sheets, 30 Pack, 2mm Thick, 9 x 12 Inch, by Better Office Products, White Color, for Arts and Crafts, 30 Sheets Bulk Pack : Arts, Crafts & Sewing
White Soft Foam Sheets - 1" Thick, 6 x 6" for $0.94 Online | The Packaging Company
FUTURE FOAM 6 in. T Multi-Purpose Foam 10030BULK6 - The Home Depot
Amazon.com: MBC Mat Board Center, Pack of 10, Foam Boards, 11x14 (Many Sizes Available) 1/8" Thick, White Foam Boards (Acid-Free) : Office Products
V.A.C. WHITEFOAM™ Dressing Kits
Tenex Multi-Purpose Foam Pad 2 Ft. x 6 Ft. in the Craft Supplies department at Lowes.com