Hi, and firstly welcome to ISS!
I know how you feel I went through the same problem when I got my first scope late last year. In the end I didn't get anything and on the second scope/mount I kept the original packing to use but I have noticed you do occasionally see some cases popping up for sale second hand in Aus that must have been shipped from the US.
Also, I think there are pelican distributors in AUS
But these cases are again pretty expensive despite being able to be attainted locally I think
Good luck and let us know how you go!