Upload & Sell: On
...It would be cheaper to buy a 5D body and dedicate it to my OM lenses than to buy an adapter for each lens...
I agree. Especially if you use Leitax kits for each "keeper" Alt lens, which I now do for my Oly and Contax lenses.
Sounds like a fine idea. I'm not aware of such a product.
OTOH, Oly lenses, in particular, have the lens mount release button on the lens body, not on the camera body as do Contax, Pentax, Nikon, and etc.. It might be possible to dismount the lens while leaving the adapter on the camera, for some styles of adapter. I have a couple that I could try tomorrow, when I return home.