I'm here in central VA, 100miles SW of washington DC, nowhere near Aussie but I thought I'd say HI. Zip on down to the state forums, go to MD (Maryland) and look up the mil-air sticky and read some of the stuff those guys are monitoring. I catch a little of it here but those guys are in mil-air heaven!
I'm an Aussie too. I live in Tamworth NSW and also love to listen to the RAAF when I get the chance. There is a surprising amount of traffic up here, both from Williamtown training and from the Basic Flight Training School here at the airport.
Have you had any luck catching Singapore airforce traffic over there?
I've had no luck with the Singapore Air Force so far, despite trying for some years - do you have any frequency info? I understand the RSAF at Pearce is taking delivery of new Pilatus PC-21s (similar to the PC-9) at the moment.