My Grandfathers name was Manuel Fabela and he was from Mexico City. The date of his birth I do not know, however, I will do the homework and find out. All the names you mention are all the same of my relatives. My grandfather died in Arizona while living with my Uncle Art Fabela. He use to live in Santa Maria, California. Does any of this correlate with any information you may have obtained? I also have a cousin named Manuel Fabela. He is about 36-38.
I hope you reply and if this is you cousin, I hope we can work together to find out our roots.