When I imported mine I didn't get an Export CofA - it is not required for private aircraft especially (but check with the person who will do your CofA). The Export CofA must be done with so many days (90 from memory) from a 100 hrly so consider whether you want that extra work done. It was very convenient that the maintenance organisation was approved by AQIS so the container went directly there.
If I had my time over again I would've paid for my LAME to go to the USA and do the pre-purchase inspection.