Hacienda de Oro is produced in Amatitan. The somewhat awkward website linked above seems to be maintained by somewhat of a conglomerate of at least a couple of factories in this town that's just down the road from Tequila and made famous by Herradura. There is some information in Spanish and a number of links to pages for various products but it mainly just takes you in circles. It's probably an older site in desperate need of an update. There are pictures of Hacienda del Oro Reposado, but no reference at all to this blanco or the añejo that is also available in Mexico.