Tucson, Arizona, folklorist James G 'Big Jim' Griffith compiled a CD: Heroes & Horses, Corridos from the Arizona-Sonora Borderlands, published by Smithsonian Folkways Recordings. I wrote a review published at Musical Traditions. As I said there, otherwise, I'm generally ignorant -- but Big Jim is a friend whose introduction to the form I trusted.

I see that the link from there to Smithsonian Folkways doesn't work any more -- when the album came out, the full notes were available online. Track samples and brief notes are now available here.

~ Becky in Tucson