The Region 1 disc was released by an independent company called Leo Films. It seems to have been their first DVD release, and it's a bit rough around the edges, with menus that are a bit painful to navigate, but it's not too bad (at least it has a menu!).
The Region 4 disc is missing:
The Region 1 disc is missing:
The Region 4 DVD is clearly inferior in terms of features, but the transfers are pretty comparable. If you really want to buy this film, the Region 1 disc is the better one.