Eek, four hours? I didn't think it'd take that long.
Have you tried both 9G and Makin' It Natural in Clovis? I have no idea about either of them, just found them in a Google search.
Amarillo has this one: http://www.naturalgrocers.com/
Lubbock has this one, in the Tech Terrace neighborhood (which used to be--and probably still is although I haven't been back in awhile--a really cool area with coffeeshops, etc.): http://alternativefoodcompany.com/