The issue is cost.. Making something that someone can "stomp" on calls for some robust parts. I made one of my controllers for another forum member. Even using simple arcade buttons runs about $40 after s/h. 1/8" Aluminum face plate and oak chassis http://i1105.photobucket.com/albums/...C/100_1325.jpg He asked if I'd make it a little smaller then mine so I did.
I even looked into getting regular effects board peddles and those parts cost even more. My current foot controller uses the arcade buttons but I'm looking int casting peddles more like an effects board. But I'd first like to figure out how to add a Wah peddle to round out the controller better.