I'm starting to see some chatter about Spirit Airlines taking Aussies on an E3; this is a decent place to be. So far, it's limited data but appears to be those who've been here at another carrier like a regional and make the jump from there. I don't see evidence of anyone going from the boat with no FAA tickets to Spirit nor can I find a formal announcement from Spirit that they're recruiting Aussies like Frontier has done.
I've tried to ask around but don't have any firm data from my limited sources. In any event, apply to Spirit and see what happens.