I believe you can find it via archive.org, but you should probably ask Paul Khoung (pvk.ca) to push it to GitHub or something.
It’s such a shame that the Common Lisp community has to rely on archive.org so much. I remember working with others to recover (IIRC) https://wiki.alu.org/ from archive.org after... something.
In fact, it loks like it’s inaccessible now, at least in my browser. Google does have some pages indexed though: https://www.google.com/search?q=site%3Aalu.org
Yes, it is unfortunate. Information loss on the internet is not limited to CL, however, and many of my bookmarks became stale over the years. When I encounter a "treasure trove" of information, I make sure to archive it on my machine (and ultimately on backup hardware). Sometimes I put it up on sites like GitHub.
You're right, it was: http://web.archive.org/web/20081120155011/http://www.discont...
I tried looking for this on QL and github but couldn't find it ... do you know if the common cold source code is still available somewhere?