I had the same problem with other projects like that before. We were lucky on finding older builds in some Linux distribution repo. Maybe you can also try looki

I had the same problem with other projects like that before. We were lucky on finding older builds in some Linux distribution repo. Maybe you can also try looking in Suse's or Debian's repos for them. Another, often used alternative is automatically building an open source project for yourself. Especially if you find that new versions build your system on a regular basis. Building it yourself is the first step to get involved in the release process.