Didn't see anything on maximumpc.com. From your description, I'm still unclear as to how you're going to use this machine as a Tivo box...
As to the cases, I thought you were looking for a (non-PC) case, suitable for an audio/video component. But I still may be able to help... A few weeks ago, I ran across a couple of sights that reviewed tons of different cases and had links to case manufacturers' websites. I'll see if I can find it in my history.