I'm a proponent of the "build it yourself" method. It's real cheap to either buy a piece of 3/8" or 1/2" ply or just find some laying around. Next thing you do is swing by your local bicycle shop and ask for some used chain and a chain breaker tool ($5). Install the links on the bottom of your pedals and then position the pedals on your black painted plywood and then screw everything into position. You're ready to rock!