Oh yes, they made a 21f3.5 Ricoh in screw mount. I know, because I have one of them. Very small and compact and not bad at all. On par with a 21/3,4 Super Angulon. The guy at Ricoh who designed it gave me one years ago. The lens is nice and the finder is atrocious!
The GR 28 was another of their lenses, good but quite flare prone.
This guy has a lot of toys, the Contax G to LTM/M adapter was made in Tokyo - I dont know if it ever went into production, but I saw some prototypes at one time. Supposedly Kyocera stopped the guy from going into procution at one time.
He misses some of the stranger ones, the Hexanon 60mm f1.2, the Konica collapsible 50mm f2.4 and the Bi-Hexanon 21-35 in M-mount.
There is a "cottage" industry in Japan when it comes to making lenses for rangefinder cameras. Some are better than others, but you certainly can find something strange even without to much scrounging around.