I decided to create an archive of these programs, and the community helped me find every version I needed.
Even if someone found a download link or purchased a copy off eBay, there was no guarantee it would be a safe download or a disk with a working key. As a user of CS6 programs myself, I felt frustrated that these programs, which work perfectly fine, could no longer be purchased or downloaded by anyone, not without the chance of getting viruses anyways.
In 2019, Adobe took down all installers for the older versions of their software.