I not only visited the site, I used to live there from 1956 to 1971. The place is a beatyful sample of the arquitecture of the time, although it has been modified during it´s working time, it still keeps the flavor of the past glory.
It is a shame that the people encharged of it´s preservation haven´t done anything to prevent it to collapse. It needs an external help desperatly. I hope you could do something to protect it
There are some people who have been working for the last three years. You can contact them in the following mail: fotovisa@yahoo.com.mx