where can i find a fiberglass manufacturer in mexico who can sell me supplies?

Answer 1

This might seem unconventional, but it makes sense... why not ask any of your American suppliers if they have distribution centers or plants in Mexico? I used to work for a sign company, and we used similiar suppliers all over the United States. One I recall sold fiber glass and it was called Montroy (http://www.montroysupply.com/)