XRAY - Model racing cars

The shocks that I have are the ones that the T1R has on it (what ever they are). In the setup book it shows the springs and there hardnesses. The yellow is super soft and the white is soft. I have gotten some other springs (that aren't Xray) that are just slightly harder than the yellow springs. I might get those white springs off teamgp because the current springs are a little too short. How much would the postage be to send them to Queensland Australia?. Thanks Drew.