I found a cheap way to get a 21mm f/1.2 (APS-C equiv), I just bought a film body and put it on the back of my FA31
Even a much cheaper FA35 is like a 23mm f/1.4 and ye 'ole FA50/1.4 is like having a 33mm f/0.95. With a MZ-S I don't even have to give up AF or pTTL.
These kind of specs are pipe dreams for APS-C digital wide shooters.
Seriously, a film body makes some sense while we wait (and wait ... and wait) for Ricoh to bring us either a wide fast lens, or a FF body. It's cheaper than a D700 at least.