Looking for pointers to old Control Data software

I've just (mostly) finished an emulator for a Control Data lower 3000 (CDC-3300 and CDC-3500) system (circa 1966) and am using it to play with an old operating system developed at Oregon State University in the late 60's and early 70's. Mostly it seems to run ok, so I'm looking to expand my test sphere. Does anyone on this list have pointers to old Control Data software, specifically 7 track tapes (yes I can read these) and possibly documentation (though I do have many of the old user manuals.) Specifcally I'm looking for the following operating system: MASTER Control Data multiprogramming "real time" operating system. Support limited timesharing with users submitting "jobs" from terminals. MSOS A "mass storage" simple OS (more like CP/M except spool printing) SCOPE A "tape based" system even simpler than MSOS Any Diagnostic tapes would be helpful as well. I'd be happy to copy and return (and in a newer media format) any such items. I've tried contacting the lastest version of CDC and they offer no help whatsoever. Even refused to allow me to release copies of any of their old manuals "for liability reasons." (don't get me started!) Thanks, Gary