My .02… You might also try any area powwows and such where there are usually NA food vendors selling fry bread, tacos, etc..
As an aside… I had a NA friend in New Mexico that would send me a great bread that could be bought there from roadside vendors. They were beautiful round loaves, with what I think was a strong baking soda tang. Made excellent toast.
Unfortunately this good friend passed away 2 years ago, and a trip to New Mexico (which I love) is not the same.