Buying Solar Batteries in Mexico

As alluded to in a previous post, I am in the early planning stages for an off-grid home in a permaculture community outside of San Miguel de Allende (state of Guanajuato). My plan is to purchase PV panels from NAWS but as for batteries I don't know. I understand "wet-cell" batteries are considered hazardous material as far as transport not to mention the heavy weight if I was to trailer them down to Mexico from the US. I would like AGM batteries (but cost is so high now). So I think the best solution might just be to buy "wet-cell" golf-cart (or larger L16) size batteries in Mexico (hopefully near San Miguel de Allende). Do any forum members know where batteries can be purchased in Mexico for a good price?

Thank you,
Kevin