if you get desperate home depot sells the right kind of carpet. look for non stretchy with a flat semi hard back. home depot has lots of carpets but in the madison store only the green and black wuld work well. i used the black and i liked it. its more expensive thgh, cost me $30 to carpet a 4 cubix foot box. with about a foot of carpet left over. partsexpress is my new source and is awesome.