It was dumb of them to completely remove the download link, considering the only way in which it was vulnerable was if you run a malicious RDCMan file from someone else. That is enough to make pretty much *any* application or MSFT product vulnerable, but I don't see them yanking Windows OS from any store shelves...
Anyway, I uploaded the msi installer for RDCMan to Gofile just now. Here is the link:
https://gofile.io/?c=lpUfLG (the direct url is https://srv-file7.gofile.io/download/lpUfLG/rdcman.msi if you don't want to bother with their landing page and advertisements.
I did it anonymously so I don't know how long Gofile will keep the file up. If you're in an enterprise environment, you probably have a server or fileshare where software installers are kept. It would be wise to add this msi to that location for future use.