John's website says this about it, you'll be extremely lucky to find a copy. It sounds interesting, good luck:-
"Released in Australia only. The theme tune to the Australian film of the same name released in 1978 and directed by Esben Storm. The song was recorded on 29th July 1978 at United Sound Studios, Sydney, Australia with final mix and production in March 1979. The B side is a live recording of Certain Surprise recorded in Sydney during a tour in 1977.
This has not been released in any other format, on an album for example, however a live version (albeit very different from this single) has been released on Live At The Bottom Line, New York 1983 (Collectors Series Volume3 by Voiceprint in 2001). A very rare single, if you ever see one buy it!"