I am unsure about a Bathurst, NSW, Aus based rally. (as mentioned in the Dirtfish article above)
I will have to ask the cuzz who lived near Bathurst for about 20 years, where the good roads are.
The Caves Rally is relatively nearby,(in Aus distance terms, Oberon @50km from Bathurst)) I hope some better roads than what I have seen in the videos can be found. (Some roads appear to be point and squirt after a fast powerslide corner)
Caves Classic 2019 https://youtu.be/lRmUJwzOFIo
Turn off the sound - squeaky co-drivers warning.
caves rally incar - fairly rough stage
https://youtu.be/b_f9yG4cB-4

Batemans Bay in car (Half the distance of what Coffs is from Sydney, but to the south) appears to have interesting roads.
https://youtu.be/pUzoDyiLPlU?t=58 (squeaky co-driver)

Canberra would appear to be a compromise option, 100kms? further from Sydney than Bathurst. Long history of the likes of the Castrol Rally and Asia Pacific and Australian Rally Championship rounds held on the roads around Canberra. Would September work for Canberra? no event clash to pack out the accommodation?
Greenwash the rally for greenies/ politics?, make the cars run on LNG & electric hybrid for the Aus round (Aus has lots of LNG, less emissions than petrol)
Canberra Rally - incar (fairly typical stage for Canberra)
https://youtu.be/KNmXlZX7qJI