Put in Brewster Buffaloes in AU RAAF colours because I am not sure what they would use as aircraft, suggestions?
The Buffalo is definitely a credible for a pre-war 1939 Australian Navy. The aircraft quickly became outdated though, so not for long. Maybe it could be replaced with an aircraft made under licence, such as the Sea Hurricane (from 1941), Seafire (from 1941/2), F4F Wildcat (from 1940), F6F Hellcat (from 1943)
Also, you would want to look at bomber and torpedo bomber squadrons to make up a complete carrier air group. Aircraft like the Fairey Swordfish (from 1936) and the TBD Devastator (from 1935) would be realistic torpedo bombers. The CAC Wirraway (bomber/attack), SBD Dauntless (from 1940) are examples of potential bomber/attack aircraft. - All dates are approximate -
This being an AU, you can use a bit of artistic license and 'navalise' aircraft designs that never were in real life (I'm thinking P-51 Mustang), or create your own completely.
I'll happily draw/edit you some planes from planebucket if you like. Will you be redrawing the Ballarat
again to later-war specs?