We have Progressive and it does cover collision for all of Mexico. But be aware that some comp. items are NOT covered in Mexico. If you have theft of personal items with Progressive they do not cover you outside of the USA. BUT if you have an accident in Mexico the vehicle must be repaired in the USA. That is a good thing! If the vehicle is not drivable they will tow it back to the USA! I think the Mexico option was $5.00. Of course Liability must be purchased from a Mexican insurer. I will echo the comments on Lewis and Lewis. We have been using them for over 20 years and they are great!
Moisheh