Well......Hows does Europe, Asia, the Middle East ect...get Cessnas over there? And no they do not have a factory in every region of the world.
Believe it or not it can be done, they sometimes add extra fuel tanks, or make lots of little stops. I must say you have to have some guts flying a small single engine plane over the north Atlantic. But back to the original question they land at a bunch of airports en-route to there final destination!
ETOPS: Engines Turning or Passengers Swimming