[spdbrake]

Unfortunately no.
The spacers are not BMW E36. Sometime in the last decade BDR switched to different shorter axles and integral splined rear hubs along with ventilated rear rotors and ditched the E36 OEM axles. The source and part numbers of the newer axles is still a secret as are the sourcing and part numbers of almost all Backdraft parts. Frustrating to say the least as the company holds that information under lock and key in a effort to funnel aftermarket sales back to BDR only.
But I do admit it is a business and other Cobra companies do much the same.

Stepping off my soapbox now.