HP 2100A stuff - info needed

I also found an HP2100 in a skip (dumpster) about 5 years ago. I was allowed to rescue it, and it now sits in my workshop awaiting restoration. Alas I got no manuals at all with it. [...] Is that the RK05-like thing with one removeable pack and 1 fixed platter? If so, I found one too, but the front casting got mangled when it was removed from the rack. Alas I didn't get a PSU for it. A useful trick with these is that it's easy to change a couple of components and slow them down from 75cps to 50cps (the speed they run at when manually feeding anyway). This allows them to work correctly even with a worn-out motor brake - since spares are _very_ expensive, and a working 50cps punch is still quite useful - I do this rather than replace the brake assy. Found one of those with the 2100A as well. My machine seems to have the CPU cards (a label on one them says 'FP ROMs fitted' I think), the memory area is full (although I'm missing one 'over the top' connector from one of the core boards) and I have a fair amount of I/O (disk controller, 8 bit I/O, 16 bit I/O, relay card (?), timebase generator, tty, plotter, etc). What I don't have is any manuals. I've read the excellent web site, but I really need the PSU and system schematics. HP can no longer supply them AFAIK. -tony