The Almighty Boat Cushion: A guide to boat cushion fabrication, foam, fabric, fit & style! - The Canvas Works, Sausalito, San Francisco
Amazon.com: FOAMMA (4-Pack) 3" x 19" x 19" HD Upholstery Foam High Density Foam (Chair Cushion Square Foam for Dinning Chairs, Wheelchair Seat Cushion Replacement) : Arts, Crafts & Sewing