The carneceria with the huge mexican flag on thier sign. They are located on Web Chapel, almost to Northwest Highway. They have pollo marinado and bistec marinado. I prefer the chicken. Make sure you get the maiz en todo from the lady selling it out front (if she is there).
You know, I like the central market version, but I'm almost positive that they add soy sauce to the maridade which makes it taste more asian than Mexican. I grill it and add Asian touches and it's great.
I spoke with one of the meat guys at the Plano CM and they told me they rotate between a few different marinades and the one they were currently using (at the time we talked) was http://www.jardinefoods.com/store_pro.... I picked up a bottle and sure enough, it was the same taste.