I can not find an Olympus OM lens to Leica screw (L39, LTM, M39) mount. I can find OM lens to Leica M, and a Leica screw mount lens to Olympus OM but not the other way round. I want to mount my Olympus 17mm lens on my Leica IIIf body (scale focus I know). Seems to me ebay had them 8 years ago but now nothing pops up. Any idea where I might get one? Thanks!