Yeah........I might even get a little sneakier.
Ship it as used engine parts or a used engine and de-value it as much as you dare. Actually , you aren't cheating with " used engine " since it will have dyno time. :D
Shipping from California to Oz will be cheapest I bet , but if you ship from a major hub ( most any large city ) the costs won't be too much different.
There are a couple builders with stellar reputations and magazine exposure....Brian at IMM being one of them.