Can anyone reccomend an auto insurance to cover my vehicle while visiting Mexico?

I have Progressive , but they will only cover 20miles in from the border. We are traveling all the way into Michoacan, so that won't help. I just want to know if anyone can refer me to a legitimate auto insurance for taking your vehicle into Mexico. Please give me any you know of either by website, or phone number, or even by name and I will look up the rest. Thanks