I believe they would have to become an authorized Michelin dealer and also one who would work with National Accounts.
I had some Goodyear and Michelin tires quoted me at Good Sam just one week ago in Ft. Worth, Texas on I35. The clerk wasn't all to informed on tires and they also were not too educated on operating their computer. Once, I obtained the quote, I asked if they honored some military or disabled discount .. nothing .. it's the same price for everyone. So I contact Michelin and was given a quote for $227.00 less per tire than what Good Sam offered. The FMCA Michelin program prices were just for the tire alone and the same for Good Sam. I wanted to compare apples to apples.
Same thing for RV batteries, all they had was Excide for $149.00 apiece. I can find them much cheaper for the same or better brand.