Amazon.com: Silverlake Craft Foam Block - 3 Pack of 11x17x2 EPS Polystyrene Blocks for Crafting, Modeling, Art Projects and Floral Arrangements - Sculpting Sheets for DIY School & Home Art Projects :
STYROFOAM R-4, 0.78-in x 8-ft x 4-ft Residential Sheathing Faced Polystyrene For Use In Garage Doors Board Insulation Sound Barrier in the Board Insulation department at Lowes.com
Expanded Polystyrene (EPS) Foam Manufacturers and Suppliers in the USA
Universal Construction Foam - Expanded Polystyrene (EPS) and STYROFOAM Brand Foam Products | Geofoam, Styrofoam, EPS & Polystyrene | Universal Construction Foam
Styrofoam | Houston Foam Styrofoam White 4x8x1" | Reece Supply
3/4 in. x 1.25 ft. x 4 ft. R-2.65 Polystyrene Panel Insulation Sheathing (6-Pack) 150705 - The Home Depot
Giant Sculpting Foam Blocks - Insulation Company of America