If someone on the forum has one, maybe they will sell it to you or let you have it. I ran Ecsta XS in the front and Direzza in the rear at autocross before in my S2000 when I was moving from XS to Direzza and it was okay other than the fact that tires had different operating temperatures and behaved differently. If you were to buy a tire, I'd say get two and use it to your advantage. Z2s are a little more sticky from what I've heard so put them in rear if your car oversteers naturally or put them in front if your car pushes. Just my .02 cents. I just went through the same thing with nail in a perfect tire on used wheels so I feel your pain. Hope it all works out for you.