Amazon Prime has a lot of Rifftrax. And they might get back Cinematic Titanic as well (Ivan Askwith, the main producer for the MST folks, said it was in the works)
The sequel is more entertaining as it stars Ted Prior as Carradine's son time traveling back to work with him or something (I can't remember the plot). It moves at a slightly better pace and Carradine is slightly less drunk in that one.