Someday........ There was a guy on foureyedpride a while back talking about having some made, and there have been a few threads about cutting out the centers and welding them into 15" or 16" wheels.
An experienced aluminum welder could cut them at the end of the bars and weld them to even 17 inch rings to make a full rim....they'd have to extend the bars out to the right length.. i bet it would be nearly impossible to center them up though. Probably would be better to have them custom made, and then you could get them dished a little bit....THAT would be the whole difference... Have them made with about 3 inches of outter lip like ZS rims are, and then i'd be all over'em.