With a few scratch builds going on at the moment I thought it'd be good to create a thread with up to date places to get timber here in Australia. I'll start with a few that I know of (but haven't necessarily dealt with), feel free to add to the list.
Guitar Timbers Australia (https://guitartimbers.com)
Tasmanian Tonewoods (https://tasmaniantonewoods.com)
Australian Luthier Supplies (https://luthiersupplies.com.au)
Kirby Fine Timber (https://kirbyfinetimber.com.au)
Australian Tonewoods (http://www.australiantonewoods.com)
Tasmanian Salvaged Resurrection Timbers (http://www.tasmaniantimbers.com)
Guitar Woods (http://guitarwoods.com.au)
Southern Tonewoods (http://southerntonewoods.com.au)
GuitarAust (https://www.guitaraust.com.au)
Trend Timbers (http://www.trendtimbers.com.au)
Loggerheads (https://loggerheads.com.au)
Local hardware stores may have suitable timber as well.
And obviously if you are doing semi-scratch builds then it goes without saying to check out Adam's collection of necks on the pitbull website.