I have the Dutch Esselte CIC Video release, VHS of course. This company was also active in Scandinavia and released it there too, with the same artwork. The opening titles are widescreen, but after this the picture switches to fullscreen. Picture quality is quite alright though, as far as I remember.
I wouldn't expect much from that Australian dvd. I believe they released some more spaghettis, fullscreen. Just another dubious cheapo DVD distributor. This is a good film and needs a nice DVD release.
Here's the VHS artwork: