I did some serious investigation into doing this a while ago and came to the conclusion that trying to do it without hiring an import agent would be fraught with many time consuming issues.
You need an agent that is familar with the particular docks that the aircraft is coming into plus if you can find one that understands the complexity of aircraft importation that too would be a bonus. I think you will really struggle to get it through the docks and the docking union procedures etc without one..