you could use the mymybox blueshark foam pad. its prety durable.and just 60$
http://www.mymybox.com/ddrmbsdx.html
or a cheap gamestop one
but the blueshark one is hard and it works good and you can ...
i recently built a ddr pad with instructions from riptide.
http://www.freewebs.com/tmstupid/01-21-07_0038.jpg
i know the bar is pretty low class but it works. I also put christmas lights in it which ...