Nicholas Gilman has written a book on Mexico City's Best Tacos. It is available via Amazon. Unless I missed it, there isn't a full blown map of all the places. Though each listing has an excellent vicinity map.
Today, I went a step further and created a map from the index in Google Maps. You will see a photo for each place and reviews. However, where several places with the same name showed up, I just put them all in. Here is a link and also a screenshot to give you an idea.