First not an advise as definitively not qualified
why not get it money from australia back in the us?
in the last month alone, the AUD has fallen 5% against the USD, and if shxt hits the wall, you are better off putting your aud in usd, or PM;
ETPMAG and PMGOLD are respectively silver and gold exposure available on comsec;
I am personally looking at how to get money out, and it is not easy..to open a US account
If living in the US now (not a given but is it the case?) you are lucky to have access to both US and international market via the NYSE
Much harder from here believe me
hope it helps