Ko.Fe.
Lenses 35/21 Gears 46/20
I'd really go the Olympus VF-1 route if you want 35mm.
Here is what I was able to find for m43 frame (VF-1) and so called 35 mm frame:

https://www.dpreview.com/forums/thread/4439409
It should works as M43 and 135 film format VF for 35mm (FOV) lens.
I got one for low price. Its brightlines are not always visible... But even 100 CAD SBOOI I have isn't showing them perfect from time to time.