Amazon.com: T.F GHG Dense Foam Needle Felting Mat - Black Large Rectangle/Square Thickened Mat - Flat Panel Foam Pad Pin Cushion Mat Holder Craftwork Tool (Square, 8" X 8" X 2.1") :
Needle Felting Foam Pad - 4" x 6" with 2 felting needles – Great Lakes Fibers
Sashiko Ring Thimble | FInger thimble with plate | Studio Koekoek
Needle Felting Foam Pad (9" X 8"), Felting Equipment - Halcyon Yarn
Grey Fox Felting Foam Needle Felting Block | BLICK Art Materials
Foam Block | Quilted Joy
Amazon.com: Large High-Density Needle Felting Foam Pad White12"x12"x2" (30x30cm) : Arts, Crafts & Sewing