I'm a DIY kinda guy, making some disks would rock! Cut a cardboard templet to fit the rim (that will end up looking like pac-man!) and transfer that to a thin sheet of plastic. Butt the ends, glue, paint, mount on wheels, and ride super fast! Just an idea I wanted to share. BR+K has an article about making them from fabric and glue, if I remember right. Anyway you try it, the cost sould fall well below $300!