Help in Zacoalco de Torres

Hi, Everyone,

I am tracing my ancestry back in Zacoalco de Torres through the 1800s and I got stuck on my great-great-great-grandparents. Here is what I have:

Jose Santos Reynaga b. Abt 1864 m. Cristina Frias b. Abt. 1864
-Maria Concepcion Reynaga b. 21 May 1884, Zacoalco m. Crispiniano Toribio b. Abt 1871, Zacoalco
+Victoria Toribio Reynaga de Ruiz b. 5 Sep1904, Zacoalco
+Jose Alfonso Toribio Reynaga b. 14 Aug 1906, Zacoalco

I need to find parents for both Jose Santos Reynaga and Cristina Frias. I can't find any record of their births or marriage. I've searched many volumes of records from Zacoalco. I do not know if they were born in Zacoalco. I checked the hijos naturales, as well, and still had no luck. There are a few other people across Mexico with similar names, but I am just lost on how to find the next generation back. I estimated their DOB based on their child's DOB.

Also, I can't find a birth or baptism record for Maria Concepcion Reynaga. I found her DOB on her immigration record when she came up to California to visit her daughter Victoria. She lived in Tijuana for a time with Jose Alfonso.

Do any of you have these people in your tree? Can you help me find their records?

Thank you!
Natalie Estrada