I know you are not in victoria - but the following vic websites might give you a place to start....
Autism Victoria

Asperger Syndrome Support Network Victoria - Home

There are a couple of GREAT articles on the Tony Attwood website - but I will PM you with that link, cause I am not sure I'd be allowed to put a business link in here

Good luck, getting a diagnosis of any type is challenging, but if you try to maintain a routine and keep things as consistent as possible, while preparing your child for changes, things can go smoothly.

best wishes, and big s