It might be on YouTube, now that I think of it.
I've got one of the episodes on a DVD as one of the features on the "Life of Python" box set. So I've seen that one and bits of the other one. The one featured in full was filmed in English and dubbed into German while the other, even rarer episode, was actually filmed in German with the Python guys learning their lines phonetically.
If anyone remembers the "Little Red Riding Hood" sketch from "Live at the Hollywood Bowl" (With John Cleese as Little Red and a very small dachshund on a leash as the wolf) that was a clip from the other German episode.