Vintage Our Lady of Guadalupe Painting

I found this Our Lady of Guadalupe at a yard sale a few years ago. I believe the image is based on one at a Cathedral or Basilica in Mexico and wondered if it was kinda mass produced for the public market? Appears to be painted but unsure if done by an individual or sold in bulk for a tourists market? Back has a paper label from Ashmore Paint Co. in Corpus Christie Texas assuming that is where the piece was framed. Any information especially including its' approximate age and if it was a mass produced item would be welcomed. Thanks much & Happy 2016.