DexaFit lists all their locations around the country -
https://www.dexafit.com/dexafit-store-mapper
I forget the exact cost but it's around $100. Sometimes they run BOGO 50% off, package deals where you can get 3 for a discounted rate, etc.
Dexa and underwater measurements are considered the most accurate methods of measuring body fat. I stick with Dexa because I've done it for 5 years and I can compare all my historical data each time. Dexa measures lean mass, fat mass, visceral fat, bone mineral content, gives breakdowns of lean mass per each arm and leg, android vs. gynoid fat distribution, and more. It's an invaluable tool for both those who are very serious about their physiques and everyday people wanting to know where they stand.