Surely you'd be better off selling the Z4M steering parts separately on eBay? There must be some demand for individual replacement parts for accident damaged or faulty Ms, and you'd probably have no trouble shifting the intermediate shaft to a Z4 owner wanting to upgrade from EPS.
I think this thread has highlighted that nobody is going to pay M prices to buy a complete steering conversion kit when equivalent components can be obtained from E46 models (or E9x platform for N52 compatible pumps), and you are pretty unlikely to find an M owner needing to buy a complete kit?
Chris
