Dear Aileen,
I see you have received several responses to your enquiry already and those companies will be able to service your needs. Can I recommend you visit the Screen NSW, website at http://www.screen.nsw.gov.au which has lots of useful production information such as film contacts, location authorities, etc.
You can navigate through to Filming in Sydney & NSW, which has maps, Stacks of Facts, and our location photo database Reel Scout. All of this information is also available on our app and here is a link to a demonstration.
http://snsw.reel-scout.com/mobile/SNSW_RS_iphone.mp4
If we can help you in any way please do not hesitate to call our Production Attraction & IncentivesTeam on 9995 0975 or production@screen.nsw.gov.au
Regards,
Screen NSW