Among this discussion of the lack of a viewfinder, I haven't seen anyone mention the
GV-1 or
GV-2 accessories from Ricoh, or the possibility of using any third party one. The GV-2 in particular is very compact.
However, i don't think I would buy either, because once I get a sense for 28mm again, I should be able to see the shot anyway and just pull the camera out to take it. That's what I ended up doing with the GR Digital, and to some extent with my K-01 + 21/40/77mm kit. It's different with zooms. Having said that, I do realize that framing is not the only use for a viewfinder, especially an EVF.
By the way, I just noticed that the code number on the bottom of the GR III says R02010, which means that the new camera Ricoh registered last October is now accounted for.