Need a little help...

I have been searching for this marriage record and cant seem to find it ( Im probably not looking in the right church). Maybe fresher eyes could find it for me. Please and thank you.

Its the marriage record for my gggg grandparents.

Name: Jose Cayetano Ruiz De Esparza
Birthplace: San Vicente
Spouse's Name: Maria Antonia Macias
Spouse's Birthplace: Cruz De Lobato
Event Date: 09 Sep 1820
Event Place: Asientos, Aguascalientes, Mexico
Father's Name: Gabino Ruiz De Esparza
Mother's Name: Maria Luisa Valadez
Spouse's Father's Name: Patricio Macias
Spouse's Mother's Name: Maria Nicolasa Diaz

Gracias,
Marylouise