You're all in luck! After years of paying shipping for frozen Hatch chiles and dried posole (hominy), Wally World carries both--frozen. Obviously, I'd prefer the fresh, but these are great for stranded homesick Texans who can't jaunt over to far West Texas (where you can get the stuff easily) or NM. I've never used pork ribs--any lean pork roast works great, or you can use chicken (but it won't be as good, IMO). Found this recipe, similar to what I make. I always used comino as the seasoning, rather than cilantro...toast the comino first in some butter. This is perfect for a slow cooker, but I've made it in my big stock pot many times (I usually freeze it in portions because the craving hits unexpectedly). You can shrink the recipe to fit the size of your pot, too.
http://www.geniuskitchen.com/recipe/territorial-chile-posole-stew-146958