I only dropped out 'cos I couldn't justify the annual subs while living in Oz.
If you still live in Oz, why not consider joining a local club that has reciprocal membership with the RAF Club (and many others around the world).
Not that I'm biased, but one could look no further than the
Naval Military & Air Force Club of South Australia
Membership fees for country and inter-state members, start from around $AUD200 p.a.