I'd been waiting/hoping to see this support Cata Classic but after looking the repository up I see that you're no longer playing. So, I took it into my own hands. Please see my fork here:

https://github.com/tseufert1/TitanRaidLockout/tree/master-cata

This adds support for all Cataclysm raids and heroics, and in keeping with the introduction of flexible raid lockouts, it collapses display of 10/25 and heroic/non-heroic for Cata and WoTLK raids to a single line per raid instance.

Please let me know how you'd like to proceed if you think this is worth integrating. I don't actually know much about writing WoW UI mods, wouldn't be able to write something like this from scratch, so I'm not sure I'm the maintainer you're looking for. But I was able to get this update working to my satisfaction.