The federal government requires most fresh cider to be pasteurized before sale. The only exception is for sales directly from producers to consumers (so no middleman like a grocery store). Therefore, the only way to get real, authentic, unpasteurized cider is from a local cider mill - fairly common in Michigan, probably much less common in Texas and Florida.
Around Ann Arbor, I like the Dexter cider mill in Dexter and Parmenter's Cider Mill in Northville. Parmenter's has the best cider donuts, ever.