There is a certain irony asking about Aztlan based criminal groups when you think back about how ORO, now
Aztechnology, developed out of the technopirate outfits operating in Mesoamerica and the Caribbean.
Since they absorbed the majority of the bigger groups operating at the time, what's left are a few cartels and odds and end gangs so you can just create your own and call it done.
They are not 'pure' aztlan anymore, being a Azzie gang harvested from their own corp youth with a yak twist, but you can also look at the
Az-Yaks