"Rolling King-South Australia"
Several variants to the melody, and two sets of lyrics are given in full in Hugill, "Shanties from the Seven Seas," and another in Colcord.
There are 91 entries for "South Australia" in allmusic.com, most singers (including the one in the DT from McColl) listing it as traditional.

The "Seekers" list Athol Guy as composer, The "Irish Rovers" list Will Millar and the "Clancy Bros." list P. Clancy.
Stay away from these three arrangements and you should be OK.
(But I'm no copyright lawyer).

Also there are ten entries for "Bound for South Australia;" R. Kavana and Murray Cook appear here.

http://www.allmusic.com/cg/amg.dll?p=amg&sql