I’d try emailing them and asking if they took the stuff down or just changed the URL.
I’m not sure whom to email, or if they’ll point back to that obviously altered document. So damn frustrating, for something that would take me all of 2 minutes with a working link, I’ve spent 3 hours trying to locate (and you’d better believe I hit the ceiling... that research is invaluable to me that I’ve accumulated over the last 16 years. Had I known it would be arbitrarily removed without warning and the history prevented from being archived, I’d have copied all the information by hand if necessary).