One of the oldest of the French cheeses,Cantal cheese was reportedly enjoyed over 2000 years ago in ancient Rome. This AOC Cheese named for the mountains of the Auvergne region is often referred to as the "French cheddar", though recipes for Cantal and cheddar are very different, and so are the resulting textures. When young, it has a mild, buttery flavor that over time develops into a pleasant bite that is reminiscent of sharp cheddar.
Much of the Cantal is factory made but the Salers [sa-LAIR] version is still an artisanal cheese.
Purchase Cantal in any decent cheese shop. Whole Foods Market typically stocks it. You can also purchase it online at Amazon.com: Cantal. Salers however may be more difficult to find. If you have a good cheese shop in your area you can start looking there.