Looking for manuals, paperwork, SW for IBM 5322 Datamaster and IBM 5120 (5110 Type 3) and a case part

Hello Everyone, I am new to the list although some members will know me from the Erik's VCFs. I recently acquired two 5322s and a 5120 and amazingly all three work to some extent. 1. My first 5322 blew the filter caps 30 seconds into powering it up. I am waiting for replacement parts. 2. The second one seems to be stable but the drives may have errors - they fail the ROM based diagnostics. 3. My 5120 is actually working well except the screen jumps sometimes so I am guessing the PSU is shaky (no pun intended) at best. I don't know enough about the system to do anything more complex then run the prerequisite "Hello World" program. I have been looking for documentations, HMS, programs etc. for either of these systems to help in troubleshooting and repair. While the 5110 (type 1 and 2) and to a smaller extent the 5100 documentation is available as PFDs the other two systems have been ignored for the most part. Any help is appreciated in the form of actual physical product, digital info, or even personal experiences. I am also looking for the bottom half of the back portion of a 5322 if anyone is parting one out. Thank you.