Passenger lists

Hello all

Has anyone come across a site for the ship passenger lists for Mexico.
There must have been a least two ports where ships coming from Spain
would have arrived, Tampico and Veracruz. Where would they have kept
such records from about 1750 to mid 1800. I'm searching for my SAAVEDRA
line that ends up in Mapimi, Durango, but don't know where to look
next. Would the ships traveled directly to Mexico or would they have
made other stops along the way. Where would the ships leaving Spain
depart from amd is there access to those records. It is possible that
they might have traveled under the BALTAZAR OR SAAVEDRA name, since we
have seen documents where they interchange the last names ?????
Any help or guidance would be appreciated!

Yolanda Medina Perez
El Paso, Texas