I don't know that you have to go deep into Mexico to find light haired and fair skinned girls?
I remember last year Adelitas bar had a few Paris Hilton lookalikes, and the guys were falling all over themselves to get with her. Isn't Paris Hilton the standard of beauty in America? Personally I like her face, but if I saw her at Adelitas I'd pass up that skinny little ass.
I'm sure you can find what they are looking for in the zona or on Revolution as girls from all over Mexico find their way to Tijuana, and if you want ultra white white girls your better off staying in the US, maybe head north to Minnesota or even Canada, where they have many girls from the Nordic countries like Sweden, Norway, Denmark..etc etc. There the sun doesn't shine like in Mexico, and the girls look so ultra-white compared to the sun-damaged girls in Southern Mexico with their mixed genes that just don't show their true nature yet.
Everybody has their personal preference when it comes to girls, and there is nothing wrong with that. But that's all it is a personal preference, just skin color and hair color. It doesn't mean that certain providers are on a higher scale of class or better than their darker counter-parts.