I am in the same boat but not so much looking for a puppy. Just the right dog for us. I have actually found a dog through a rescue organisation for Australian working dogs but it is over 6 hours away in Vic. We are gong through the adoption process, waiting for someone to come check our property. They don't seem to be in any hurry though to do it. Have you tried Renbury or Animal welfare league. They are in the Leppington area so not as far as RSPCA. DH council pound gets puppies fairly often. They post pictures of all dogs on their website.