Thanks for the help guys,
The phantoms actually kept thier American Serial Numbers, main difference was the RAAF insignia instead of the American one and were assigned the out-of-sequence serial prefix 'A69' (which relates to america somehow - more info - http://www.f4aviation.co.uk/Oldstuff/2002/aussief4/aussief4.htm )
So i figured i could just get a decal sheet with Australian Insignias and just use that instead of the American one or something.
As for the Beaufighter i have found a kit and a store that stocks it :)
So far i have a list of 24 aircraft that were used by Australia (more to add yet) - out of those 24 i have found 14 kits and know of some decals and know where to get them from.
That website is legend !
Again thanks for the help guys.