DA40,
I'm afraid you're up against insurmountable odds finding a US job with your current qualifications. Even the regionals that previously hired 1500 hour Aussies have slowed down hiring. The traditionally low-time jobs like aerial survey and pipeline flying are few and far between.
Getting FAA tickets would be a project as would qualifying for an E3 visa.
If I could suggest one avenue to monitor, it would be CFI jobs. My WAG is that the CFI supply might be vulnerable if/when the regionals pick up the rate of hiring 1500 hour pilots again, many of whom might come from the CFI ranks. Just a WAG...
Hang in there...many of us started where you are.