sorry to hear, im always out n about all over syd will keep and eye out for you...
my brother inlaw nearly had his r33 gtr series 3 stolen to star city last year, they broke into it, and managed to get up 2 floors (near the exit) the immobiliser stopped them from the driving car, but we suspect they had another car pushing it form behind as his rear bar was scratched.
the security guard wasnt helpful and didnt say much. we suspect an inside job