Maybe you could play a cricket game at the home of the Newcastle Jets/Newcastle knights?
Have you considered ground size? The size of an NRL playing area is 100 metres + 10 metres end zones at each end, so 120 metres, by 68 metres. Add a bit for grass around the edge.
Hitting sixes over the grandstand would become a bit monotonous. If not real dangerous sitting in the grandstand.
So, no.