I was at a shop a few weeks ago getting new wheels for my daily driver and one of the owners (can't remember his name) had a new set of KDW2 335/30/18 tires that he had bought for his Porsche for track days but never has time so he said he would sell them. I can't remember how much he wanted but it seemed decent compared to buying new. Here is the website
www.modbargains.com you could also ask for Alan as he was the one whom helped me.