i bought some wheels that already had dunlop direzza z1 235/40-17 tires on them. one of them has a screw in the sidewall that cant be repaired. they stopped making the tire and i need a single, two questions, anyone know where i might find on in stock somewhere? ive searched online and no one ahs them in that size. that brings me to question two, i can get a Z2 in that size but i am wondering if they have enough differences that that will cause issues at the track?