Heres a pic of the complete set, arrived this morning.
It seems the bottom end set is a generic ER engine one, just for any city, But the head set says ER-5 on it, which is the code for the turbo engine so it must be different from NA ER.
Both of the sets were proudly made in Aus, both wear "Asbestos Free" emblems and they have manufacture dates. One was made in January this year, and one was made at the end of last year. I think people in australia were just dicking you around. Maybe with the numbers and stuff on these packs turbocab might be able to find out what the story is over there.