to be honest you are looking at this (and hte details) way too hard. pick a customs/clearance agent and work from there. don't go into so much detail trying to save $5. interport here in brissy are pretty much where its at and most of the local brokers use them to clear incoming frieght anyway.
if someone says globelink - run the other direction.
primo pretty much has it in a nutshell. bring stuff in and get taxed. there's not a easy way around it. he's more than used to the system as am I. both of us do the import thing on a daily basis. (mine is parts, his is cars.)