The site does list the basic make up of UK and Dominion structures in some detail:
http://www.orbat.com/site/ww2/drleo/...nf-div_me.html
Then click on the reconnaisance 'regiment' to get:
http://www.orbat.com/site/ww2/drleo/...div_recon.html
Does that look about right for the Australians too?