I recently picked up a RB 34 in decent shape, but without a lense. Since I am more interested in using this camera than displaying it, I'd like to fit it with a 135 or 152mm lens typically used on a 45 Graphic. The mounting hole on the RB's lens board is larger than that used for the Graphic lens, I think. Are there flanges available for this conversion? Where might I find them? Are there better options, where optical quality and moderate price are the criteria? I'd like to not make a permanent change to the RB's lens board, since there is some preservationist lurking in this user.

Here's your source for such work: Steve Grimes.

http://www.skgrimes.com/