I have a set of nukeproof superfly's I've cleaned and lubed the freehub a few times in the last six years but I think the free hub is about shot. My question is where can I find one that will work. All I see are free hub body shells but I can't find one loaded with all internals ready to bolt to hub. I don't know if there is a standard for a drive but the drive shaft coming out of the hub itself that the free hub bolts to and mates with is similar to a Isis drive. I'd like to keep the wheels, they are in good shape for training wheels the rims are same as my nice wheels so they are a simple swap to my nicer wheels. Any input would be greatly appreciated.