Umm, and how rare are VS60s these days?
Essentially unobtainium. They were expensive and rare 25 years ago.
You'd have better luck finding a VT11 or GT40. At least I KNOW people
who have those. I've never known anyone in the 30+ years of dealing
with DEC stuff who had a VS60.
I've been chasing a copy of SUDS for a while. It existed at Stanford,
MIT, and DEC. XKL still uses it.
The DEC version will probably be somewhere on the DEC LCG tapes. There
are bits of it on the ITS tapes that have been released. I'm sure it's
on the ones that haven't.