The old IMSA Renault Cup cars, Alliance and Encore, (yes, I keep coming back to them but they were coooooool!) ran on 13x6 MOMOs, most of which probably outlived the cars that they were bolted to! They are the ones that have circles of circular holes, are pretty light, and are the same bolt pattern as a Rabbit/Golf. I wouldn't be surprised if Archer Racing didn't still have a train car full of them somewhere...

Kirk