Hi sclipp,
Unfortunately I have no knowledge of the Mexican market so I would be of little help there although I’m certainly happy to share my thoughts about any mattress you find there if you can find out the specifics of what’s inside it.
One of the forum members (Basily) has mentioned a couple of Mexican latex manufacturers in his posts here and here.
The tutorial post includes this link to some of the members of the site that sell latex mattresses and latex hybrids online that may be helpful but I don’t know which if any of them ship to Mexico so you would need to call or email them to ask.
Phoenix