The Phantom Treehouse

When I was five years old I used to watch this movie over and over again. Then I accidentally recorded over it and was never able to find it again anywhere. It wasn't even listed on IMDb until recently. It's a wonderful little animated film about two kids who stumble into a mysterious tree house that brings them to a fantasy land with Scottish pirates, a man in a blimp, volcanoes, and a cool vegetable man called a bun yip that everyone tries to eat. Hopefully it will become available on DVD at some point. It's sort of like Alice in Wonderland, The Phantom Tollbooth, and the Wizard of Oz, but with very Australian humor. I think it aired on HBO in the 80s because I probably recorded it off that. All I remember is I had it on a tape with Daffy Duck's Fantastic Island. Ah, childhood.