My best advice is that you locate an attorney with the credentials and experience in business formation sufficient to help. Given the consequences if you do something wrong, I think it's best not to take well-meaning but anonymous advice. If this were a question I had I would find a good Notario Publico in the city where I was living or going to relocate. Or, I'd visit one in Mexico City, Guadalajara or Monterrey. Best of luck.
The LLC equivalent in Mexico is S de RL de CV. You will need a lawyer to compose the necessary documents. After you receive your acta constitutiva, there are a few more required registrations depending on your industry.