Where's the Rest?

The first episode is on YouTube, and according to Wikipedia as well as the IMDb trivia section, seven more were filmed. There is also a YouTube video (https://www.youtube.com/watch?v=Mb7ISG8VKgY) that contains clips of it not seen in the first episode.

Do we know if these remaining episodes even still exist in their entirety? I'm sure that I'm not the only one that would like to see them.