2.12 has mostly been scrubbed since we don't want to be supporting old code and possibly expected to fix bugs etc..
You can still grab 2.12 from the git repo as the tags still exist, but you won't find (at least not on here) any pre-built binaries.
However that being said I believe latest code should work just fine on 8.04 (I even think 8.04 was the first release to include DVB v5 support).
But again we simply don't officially support it or provide pre-built binaries since most people are not running it and it just increases our overhead for testing and building etc...
Adam