There’s probably plenty in Mexico. Big bottles of natural vanilla could be found in any food store when we were there, for very reasonable prices.
I don’t see the need for corn made when Mexico can just increase production to meet demand. We use the Mexican vanilla.
Besides, the next thing you know, when they find they can make vanilla out of corn, it will become another gasoline mandated additive.
Mexico also is known for making lots of the fake stuff- they sell it cheap in large plastic bottles.