Why
wouldn't factory warranty cover that stuff?
Anywho, I was looking over the brochures and it looks like the Gold Plus warranty includes a Road Hazard warranty of upto $300 prorated, which I'm assuming is per tire. Maybe it's time for Super Sports?
Btw, you should be able to get the Gold Plus 7yr/100k warranty for $1300. Hell, for Super Sports alone, it might be worth it!
Between leaking tails, crickets, and weather strip problems, you'll make more than your money back doing those things just once after the initial warranty is up.