I need new tires for my 2013 Shelby GT500. I planed on getting the Michelin Pilot Sport Cup 2 for the replacement tires. The backs are available but the front ones (265/40ZR/19) are not to be found and Michelin is saying maybe in 5 to 6 weeks. The OEM Goodyear are shot from heavy track use while my Boss 302S was down. Any suggestions on replacement tire brands?