Here's one of the few, their "Song of Patriotic Prejudice." It's not among their best, but still a lot of fun. And as I said, you takes what you're lucky enough to gets. Michael Flanders is the fellow with the beard and wheelchair, and Swann is the quietly maniacal one at the piano.
(Incidentally, apropos of nothing, Swann was indeed a very accomplished composer and on his own, after Flanders had passed away, he wrote a song cycle of music composed to the poems that J.R.R. Tolkien wrote in the Lord of the Rings trilogy, called "The Road Goes Ever On." I haven't heard it performed, but have the sheet music, and have done the best I can to play at least some of it. That "best" is a paltry effort, but it beats nothing, though not by much.)