The last time I bought CV joints they were $100 each for disk brake
versions. Drum brake CVs are slightly smaller but probably the same
price. Unlike most other cars, you can buy just the outer CV conveniently.

Where are you in OZ?

In Melbourne try either Northern Mini in Northern road West Heidelberg,
9458 2111, or Link Automotive in Thornton Crescent Mitcham, whose phone
number I don't know off the top of my head.