Amazon.com: Foamma 6" x 24" x 24" High Density Upholstery Foam Padding, Thick-Custom Pillow, Chair, and Couch Cushion Replacement Foam, Craft Foam Upholstery Supplies, Foam Pad for Cushions and Seat Repair :
High Density Foam Upholstery 2"T x 24"W x 80"L (50ILD) "Extra Firm" High Density Upholstery Seat Replacement Foam, Upholstery Foam Sheet, Foam Padding, Foam Cushions, Made In USA - Walmart.com
High Density Upholstery Foam Seat Sofa Cushion Replacement Sheets Foam Padding - Walmart.com
Upholstery Foam / Cushion Padding 100x120 cm | STOKLASA Haberdashery and Fabrics