Where to get dried New Mexico chilis

I made a recipe that called for dried guajillo and New Mexico chilis. I found guajillos no problem. I went to several stores, including stores with a lot of international stuff, and couldn't find New Mexico dried chilis. I substituted Anchos, and the dish came out good, but I'd like to try it with what the recipe called for. The recipe was for a braised pork. Where can I buy these? I know I can get them online, but they must sell them in a big city?

P.S. I didn't see Hatch chilis either which I think is the same as a NM chili.