Just bought travel insurance from InsureandGo after some search and comparison on travel insurance for upcoming domestic trip. Reasonable reviews with 20% discount from Groupon. Expire 31 Dec 2018.
Enjoy 20% off any travel insurance policy (Single Trip, Cruise Trip, Annual Multi-Trip or Backpackers) and any extras added on your policy. https://www.groupon.com.au/deals/ga-insureandgo-2
Don't forget cashback from cashrewards.
No medicare?