First deal on local AU stock for Google Home that will come with an AU power plug.
If you are happy with grey imports though, the only benefits buying AU stock provides is the correct power adaptor, and a warranty.
If no stock near you postage is available. Comes up as $5.06 for me.
You can command any of these devices with your phone too. Chances are your phone will be closer to you most of the time as well.