I got some info from one of the regulars over at the Graflex site on how to fix the shutters. Look in the RB forum for a post of mine concerning the same camera. Everything was intact on mine, but the shutter mechanism was locked up. I got it working ok, but now need to time it. You can also use shuttered lenses if need be. Measure the back to front lensboard distance and get a lens and board. An shutter angle adapter would probably be needed. As concerns the backs, I could use some slotted holders myself.
If you don't find the info, I can email it when I get home in a week or so.