I had use a Minolta Hi-Matic F case for my 35RC before getting the original. The screw hole is in exactly the right place and since both cameras are about the same size, it fits beautifully. The "Minolta" name plate is a chrome plated, single piece attachment that is stuck on with little plastic pegs that poke through the cover, and pulls off pretty easily. It's a perfect solution. If it means you have to buy a Hi-Matic F or G , then so be it; they're pretty cheap and it'll give you another cool camera to play with, though not nearly as cool as the 35RC.
I found in the web that oly35rc can also fits in smena 8m case too.You can see the minolta case in the link below
Olympus 35 RC rangefinder SAM_0015 por THE OLYMPUS CAMERAS COLLECTOR, no Flickr