I have a Persian rug in my living room that's attractive, but doesn't offer much cushion on my hardwood floors for sitting and noise dampening. I know it's possibly to buy thick rug pads, but the ones I've found have been expensive. I think it wouldn't be too hard to create some sort of cushion to go between the rug and a cheap, non-skid pad. Does anyone have suggestions for an inexpensive material that might work? Thanks!