Guys can we keep it on-topic thanks.
OP wants to know how/where he can get his car tuned in WA. You're both local but haven't come up with any suggestions/recommendations????
If you're really struggling you could look at removing your ECU and shipping it interstate for a bench flash. But I'd only do this as a last resort.
If you do want to go with APR and the dealer is that busy, I'd suggest booking in December as APR often run a special on their tunes at Christmas.