A remix of the dishwasher runner http://www.thingiverse.com/thing:14213.
Basically I just changed it so I could attacher the wheel from the original part.

I find printing ABS at 0.1 layer thickness and setting the wall to 2mm thick creates a solid piece that lasts quite a while but I intend to try printing in nylon.

I've included my sketch up file in case anyone wants to remix/resize as needed.