I could easily acquire a hub & rim, but I no longer have an LBS mechanic to lace it for me. Carl retired, and he EARNED IT! LOL!!! But, there's nothing proprietary about it otherwise,...I'm just not skilled to do it myself. Otherwise, I'd go with a Sturmey-Archer 8 speed hub instead,...Is there something proprietary about the Curve D3 rear wheel? Is it anything other than a 305 rim laced to a three speed hub of the correct OLD?