anyone know of a place to get cases for the rio carbon? I know about Vaja and their leather cases but $50 is steep, and that's not the kind I want anyway. I'm looking for something that I can use while working out. Something similar to this iPod accessory. I know they aren't nearly as popular as the iPods so ther aren't going to be nearly as many choices as there are for the iPods but are there any besides the Vaja cases?