Time to replace Michelin xza3 275/80R22.5 Where to buy?

If you belong to FMCA they say you can get a discount. I don't know how large it is, I belong but not available in my area.

I just bought 2 new 275/70 22.5 Michelin XZA2 steer tires I think the initials are, reinforced outsides for $1381 balanced and mounted. Likely not a great price but compared at another shop and is the same. have to get 4 more before leaving, mine are at least 8 years old not sure about the inside duals.