OK, I finally got around to thinking about how to do this. Download http://www.danhinsley.com/downloads/MovieLibrary.exe
into your MovieLibrary directory (save the old one so you can restore it if I ever put out a real update). When you go to search, set the kind to TV Show and you'll get fields for showname, season and episode that you can use to search.
Let me know if this is what you're looking for.