Except that CAsA have decreed that having only 1 TSO'd GPS (C145/6) is sufficient for sole-means IFR navigation without requiring an alternate! What would happen at night, in IMC enroute if that single GPS were to fail is the million-dollar question.
I don't have a VOR in the RV, and don't see the point either. Any TSO'd GPS newer than C129 is sufficient to push the "Time to positive fix" out from 30 minutes for VFR to 2 hours, you don't need station passage or intersecting radials from a VOR. A waste of time, money and weight in a modern cockpit. The only reason I'd install one would be for an ILS, but never a standalone VOR.
Anyway...Here's a bit of my handiwork from a few years ago, showing the remaining VOR's in Australia and their effective ranges.
Nationwide coverage at 10,000'. Red is ASA, Blue is private. Green is DoD.
Victoria 5,000'.
Victoria 10,000'.
NSW 5,000'.
NSW 10,000'.
Queensland 5,000'.
Queensland 10,000'.