Look on the back of your DT reciept, when I use to work there, there was a disclaimer that said if you have a blow out or nail and you purchased the certificates, if the tire has to be replaced and there is no Discount Tire store near you, you can purchase the exact same tire, get the reciept and DT will reimburse you. Also, if the plug was not done correctly and DT cannot remove and fix it, they give replace the tire under the certificate program.
Yea I didn't purchase tires from them. Gonna try and win myself a LT kit at Harrahs.AbsolutGT is on the money, policy is/was the same, i worked there also. Unfortunately the closest one is in Pensacola or TX. Get it repaired and DT will make sure it is right when you get back in town.
BTW what are you doing over this way?