Helicopter ferry flight - australia to africa
She organised all the permits, handling agents, hotels, etc for all the ferry trips I have done and she was magnificent, I highly recommend her services because you will have loads on your plate already doing the ferry flight. All her contacts and experience are invaluable and as somebody else already said: "Expensive ones upfront work out cheaper in the end."
Second the Gae recommendations. She supported 4 of my trips and being a fluent French speaker helped her sort the details in the Francophone countries. She used to be the Ops lady for the BHL charter S76 and company HS125.