Dave,
You might try contacting Zbigniew Stachniak at York University. He's the
curator of a small museum specializing in Canadian computers and I know he
has a some amount of MOD8 / Microsystems International equipment and
documentation.
Any parts, documentation or software for this machine
would be most
welcome - being keenly interested in Canadian vintage computers and
their history, I would very much like to see this running someday.
There was a guy on eBay who had a stock of NOS MF8008's, but I don't
remember his handle. I think it was the same guy who has been selling these
mounted displays of the various Intel processor there occasionally.