I had a tire blow on my 2000 jaguar trailer. It has always had the firestone firehawk Indy 500 tires on it. I've had real good luck with them so far, think that I hit something on the interstate that caused it to go flat and blow. Talked to my local tire dealer and it seems that they don't make the Indy 500 in the 215/70/15 size anymore. What is a comparable tire or where could I find the Indy 500s?