This would be the best starting point:
Military Aircraft Crashes in Australia during WW2
However, when visiting any possible crash sites please bear in mind that it maybe considered a monument to a serviceman's death, or a general war relic. Not only are there legal implications about disturbing such sites (other than just going to have a look) but more importantly moral ones.
So I wouldn't, for one, advise taking a metal detector. Also, there is always the possibility of uncovering live munitions which, after over 60 years in the ground, will be very hazardous.
I commend your interest in this area, but it can be dangerous - don't forget that most aircraft relics that haven't been recovered are still there for a reason - mainly because the locale is dangerous, either because of the geography or animals.