I think I found them!

JOSE THOMAS ROMERO
Male
Marriages:
Spouse:  MARIA MERCED DE LOS DOLORES DE NAVA
Marriage:  04 JAN 1787   San Luis, Colotlan, Jalisco, Mexico 
Messages:
Extracted marriage record for locality listed in the record. The 
source records are usually arranged chronologically by the marriage 
date.
Source Information: 
Batch No.:  Dates:  Source Call No.:
M604652  1752 - 1790  0443782

SIMON ROMERO
Male
Marriages:
Spouse:  MARIA YGNACIA CASTANEDA
Marriage:  09 OCT 1791   San Luis, Colotlan, Jalisco, Mexico
Messages:
Extracted marriage record for locality listed in the record. The 
source records are usually arranged chronologically by the marriage 
date.  
Source Information:
Batch No.:  Dates:  Source Call No.:
M604653  1790 - 1819  0443783

In the film for Jose Thomas Romero's marriage.  His parents are 
listed as Manuel Romero and Ana Maria Casas.  I think (in my opinion) 
we are talking about the same Manuel Romero.  Manuel's brother 
Joachin Romero and his wife Dominga Josepha De La Torre, are my Great
(x6)-Grand-Parents.  Their daughter, Maria Alvina Victoria Romero and 
her husband, Feliciano Acencio Marquez, are my Great(x5)-Grand-
Parents.  This is the same couple that appears in the Saus de la 
Marques Census.

- Angie