Go to an IHRA race and buy them there.
Nascar builds tires for each individual track pretty much. They don't run the same tire at Bristol, Daytona,Indy, so on and so on..... Taking the tires at the end of the day is no big deal, becasue they won't be any good anyplace but that track (in most cases) anyways. NHRA is the exact opposite. IHRA you can still use the older style tire even.
Nascar builds tires for each individual track pretty much. They don't run the same tire at Bristol, Daytona,Indy, so on and so on..... Taking the tires at the end of the day is no big deal, becasue they won't be any good anyplace but that track (in most cases) anyways. NHRA is the exact opposite. IHRA you can still use the older style tire even.