I'm not sure whether I have the repair manual or not, and can't look for it now. Everything is in an uproar. However, I'm pretty sure that you'd be able to find a source for the repair book somewhere online. Might cost some money but it could be well worth it if you have a replacement. I may have time to look tomorrow. No guarantees.
I've got a body that could use a new one; a crack in one of the tabs. I had one repaired once, and the repair has held. It was so long ago that I can't remember who did it or how I found him. Somewhere in the midwest.
It's the achilles heel of an otherwise really great camera.
If you do have a source for parts, I'm looking for a copy of the back frame. I took one off of the camera with the cracked tab, to make a pinhole camera that works with the system.