It would be pretty hard and expensive to bring one bike back by it's self.

Best way would be to find someone that brings bikes in for retailers, they have the resources to find, pack and ship the bikes a container at a time. Doing it yourself will cost the same or more and give you a brain tumor.

These guys got my MC28 for me and maybe a TDR250 to if don't make it to AU soon:)
http://www.trade.co.jp/ They only do New Zealand at the moment by the looks.