Cushion Foam by Fairfield™, 18" x 18" x 4" thick - Walmart.com
Classic Accessories Square Patio Cushion Foam, 19 x 19 x 3 inch - Walmart .com
Subrtex Soft Support High Density Craft Cushion Foam RV Foam, 72"x 24"x 2" - Walmart.com
Upholstery Foam 2" x 24" x 72" High Density Cushion Foam Pad Cushion - Walmart.com
Ritchie Foam - Upholstery Foam Cushion 1"x 22” x 80" 36 ILD (Semi Firm) High Density Foam, Seat Cushion Replacement Foam, Foam Padding, CERTI-pur Certified, MADE IN USA - Walmart.com
High Density Upholstery Foam Cushion 7"x 22"x 80" (50ILD) "EXTRA FIRM " Couch Cushion Replacement Foam, Foam Padding (White) by Ritchie Foam & Mattress - Walmart.com