Nope. I wanted one with a wide-angle field of view, so I did a lot more hacking, including a radical bellowsectomy. The details of my conversion of a Billy Record are in a photo.net thread:
http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00Cn9Z. The main issue was working out the placement of the pinhole disk in the lens mount so that there would be no vignetting. I have also since dispensed with the 35mm add-on viewfinder as it only showed about a third of the field.