At least he kept a well organized database of his findings.
It's still possible to view it entirely via the HTML version of the site at the Wayback Machine:
https://web.archive.org/web/20250703142602/https://www.musrc.com/mirror
Aye! That's what I didn't notice about this until now. I'll go check it out now.
EDIT: I just found out that his pCloud files are somehow still there.