Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier.
To help you with this issue, may I ask:
1) How long do you have before your holiday OR has it started already?
NOTE: If you see ANY requests for "additional services" - such as a phone call - please understand that these are sent BY THE SITE (and not me), and I am NOT available by phone at this time.Feel free to DECLINE any such offers, and continue in this text/chat form.
I didn't see a response here, but wanted to send the following information before I sign off for the night.
You can check on the cost of the Australia maps at the following page.
Click Here --> https://buy.garmin.com/en-GB/GB/maps/on-the-road-maps/city-navigator-nt/city-navigator-australia-and-new-zealand-nt/prod116482_010-11875-00.html
Let me recommend that if you can, try to purchase the maps as pre-programmed - on a microSD card. That way installation is a simple matter of just installing the card in your device, and turning it on.
And if you need to download the maps, I still recommend getting a microSD card installed in the device, so that there is plenty of space to store the maps (8GB capacity should be enough).
Assuming you have access to a computer, you may also want to install and run Garmin Express (click here to get it), connect the device to the computer, and then see if you can locate and price the maps through that program.
I hope this helps. Please let me know what you find or if you have any more questions.
Best Regards, ***** *****