Thats a good question. I can tell you from the oppostie side of things, its a huge pain in the butt to bring a car from the US to Mexico and get it nationalized and registered here. Theres all kinds of crazy laws that are in constant flux.
I also wouldn't recommend buying from a Mexican dealer either. They dont offer the same incentives you get in the US, they are not particularly interested in bargaining either, especially for Jeeps. They tend to have little to no stock, if you want a Jeep you pay full price and have to order it and wait. Although they have tons of Libertys on hand. We have 4 Jeep dealers here in my city that I know of and none have ever had a TJ on the lot. I went to ask about them and if you don't know exactly what you want, forget about it. No floor models, no test drives. Plus models and options are different here. For TJ's theres only SE, X and Rubi. No Sport. No Unlimiteds either, they were never offered here. Ive never seen one in person anywhere down here, and I'd love to.
I'm waiting to see if they offer the 4 door JK down here, its entirely possible that they don't. I would love a diesel though, you can get it at every gas station in the country, although I have no idea about the quality of the fuel, its probably filthy crap.