Wills, Testamentos, Bienes de Difuntos

I am trying to get a copy of Antonio de Aguayo's will. Antonio de Aguayo was a soldier in Nuno Beltran de Guzman's 1531-32 expedition to the area that became Nueva Galicia. He was an encomendero and vecino of Purificacion and presented a Probenza de Meritos to the Royal Audiencia of Nueva Galicia in 1572. I believe that he probably died between that year and 1600.
Sometime ago, a list of microfilms containing testamentos that are in the vaults of the library in Salt Lake City was posted on this site. I contacted Eduardo Soanes for assistance in searching these microfilms, but he was informed that they cannot be accessed by the public. Eduardo referred me to the Archivo General de la Nacion in Mexico City. He says that this institution is generally given courtesy copies of Mormon microfilms.
I also remember a Nuestros Ranchos member from Mexico offering research help in Mexico, but have not succeeded in recalling who that was. Does anyone know who this person is? Can you provide contact information?
Jose Aguayo Ortega