i actually had a look at those mail forwarding companies, and they are not cheap. $150 for a box of items, im not talking 4 rims and tyres, but a box that u would put a few clothes and stuff in.
tirerack charges about $350 for 4 tyres and rims. its gonna be a lot to get the mail forwarding company to send a set of rims to australia unfortunately, thats why i went with performance alloys in the uk