Headliner foam comes in 3 colors at Joanns - beige, grey and black. It is a little thicker than the foam interfacing, but is more spongelike. It is with the home decorating fabrics (the vinyls) on rolls. It is 54" wide and usually is about $14 a yard. You can use a regular item coupon, but not a fabric coupon. It will work will almost any glue.