Hi Jim
Just saw your wanted ad. I can offer a 65mm f6.3 Sekor originally from a Mamiya Press. It is mounted in a Seikosha S shutter, but not a helical, so it can be mounted on your lens board. email me at: mogman at frontier (dot)com.
It a 60mm f/5.6 Hexanon in a Prontor II shutter. Nice, light, small, sharp lens.
Its mounted to a Toyo lensboard now, but any #0 lensboard should work.