Only 66 Astazou powered Handley Page HP.117 Jetstreams were built from 1969, many of which were acquired as military trainers.
The BAe Jetstream 31 was produced from 1980.
I suspect amongst the first Jetstream aircraft imported into Australia were the four TAA Garrett powered BAe Jetstream 31's imported for the Western Queensland air services around 1984 and disposed of after TAA ceased the Western Queensland air services on 31 May 1987. They were equipped with mini galleys, toilets, a cabin attendant and a Piper Navajo baggage aircraft.
So, it is a fair bet no Astazou powered Jetsream ever came to Australia. The Astazou was also fitted to the Pilatus Porter and no Astazou powered Porters ever came to Australia.
Thank God!