FUTURE FOAM 3 in. Thick Multi-Purpose Foam 10030BULK3 - The Home Depot
UPHOLSTERY FOAM SHEET SOFT MEDIUM FIRM HIGH DENSITY FOAM ALL SIZE SHEETS | eBay
Foam sheets
Heavy Duty GYM UPHOLSTERY FOAM ROLLS 8 Rollers 26mm Hole
Medium-Firm White Upholstery Foam Sheets – DF155W
FoamRush 2" Diameter x 30" Long High Density Round Bolster Upholstery Foam Roller (Ideal for DIY Projects, Organizing, Decorating, Arts and Crafts) - Walmart.com
Amazon.com: 1/4" x 30" x 60" Craft Foam Roll End Hi Dense Closed Cell Foam Uphol Crafting Foam Craft Supplies Vibration Dampening Sculpting Off White 1Pcs : Arts, Crafts & Sewing