While H-D can legally weasel out of taking care of this, they should handle it as a customer goodwill adjustment if nothing else. I guess we will see if H-D is that wonderful bunch of fine folks that some on this site try to make them out to be, and not just the money grubbing azzholes many of us know them to be from personal experience.
HebrewHarley, even if you are sure they won't honor the warranty, I would still suggest you contact them and plead your case. It would be a drop in the proverbial bucket to them if they just shipped a new engine to that dealership for your bike (with the correct VIN). If they want to punish you for exporting the bike, then offer to pay the remove and replace labor to the dealer if Harley will supply the engine.
Just a thought.
Jerry