Louisville's PCCs never ran in revenue service; they were sold to Cleveland shortly after delivery. And speaking of Cleveland, add the City of Shaker Heights,which was a separate operation from the Cleveland city system. Also add El Paso, which got ex-San Diego cars. And I suppose Mexico City isn't considered "North America," but it's not Central America either.
The greatest number of PCCs, though, operated in Eastern Europe. The Czech carbuilder Tatra produced well over 10,000 PCCs,many of which are still operating. Some Western European carbuilders used the PCC patents, too, particularly in Belgium and the Netherlands.
Several books have listed all the North American PCC operators, including one by Seymour Kashin and Harre Demoro, and by Fred Schneider.