I know for a fact that a Charger was present at the Mopar Nats in Columbus, Ohio just recently that caused quite a stir. I don't know if the car was shipped just for the event or if it belongs to a U.S. collector.
FTIW, I did see a Holden Monaro once at a car show at Englishtown.
The Mopar collecting Wellborns in Alabama have a few of those australian mopars. I don't know why they called it a "hemi" when it obviously didn't have a hemispherical combustion chamber.