If you do your research there is an avionics mob on the Gold Coast that are Platinum Garmin dealers. They will match Spruce prices on most stuff
They are great people to deal with.
Doubt whether going overseas for a Garmin re-fit would be cheaper, might be for other brands?
The cost of 'doing business' in Australia is the killer. It is now recognised as the highest cost country to do business with in the world. That's something for you labor accolytes to be proud of (NOT).