Someone has posted an Aguascalientes online archive which is this:

http://sigue.aguascalientes.gob.mx/axweb/

to get in username: sigue.publica
password: publica

I have been using it to look through:

"lugar"
"tipo documental"
"fondo"

What I would like to know is how to use the other search fields such as:

"Escritura"

Comentario

Here is a direct link to FamilySearch.org original Church and Civil records. Most of them will list additional info not contained in the indexed files. Hope it helps you as it has me.
Ah, and sharpen your patience in reading old writing styles, he, he.

Good Hunting!!!

https://familysearch.org/search/collection/list/?page=1&region=MEXICO