An update for those that might be interested. I have ordered two front tyres from Tirerack through Clint and the service thus far has been excellent, can't fault it. Freight was US$276.58. Locally the tyres were about $520 each, if I don't have any more to pay I expect them to land for $405.00 each.
I ordered Michelin PS2s, these are out of stock in the US and Australia on long term backorder. I found that they are still available in the UK so I have ordered them and they are being airfreighted out. Locally if I could get them they are $930 each, if I don't have any more costs to pay I expect that they will cost me around $510 each.