A favour to ask....

Hi all. I am hoping that maybe someone can help me out a little. I have read the odd tutorial about making things out of builder's foam. I am not sure what this is and don't think I've seen it in Australia (and in the last four years, believe me, I have spent a LOT of time in hardware stores!!) but I would love to have a play with it. Would someone please be able to get some and send it to me here in Australia? I will of course pay for it + postage + effort required to do this for me. I will understand if no-one wants to, of course! Thanks guys!