these are aztec totems and not rat god totems. the aztec totems are needed in the tenotchitlan quest. there are actually 15 different aztec totems, the 3 of them can only be found once. the other 12 can be found in some specific locations (you have already point 9 locations) or through a radmon trader (1 in 200 chance if i remember correctly). 1 of the 3 unique is found during the askold quest inside the temple where you kill the spanish. 1 of the 3 unique is on tenotchitlan city left of the dam all the way to the rock in the water. and the last one is on the left side of the great temple, going through the underwater labyrinth.
as for rat god totems there are plenty locations, in tenotchitlan if you have the totem from the askold quest can get a dozen or more. the first treasure in the brothel quest gives one. the seek spy quest for the pearl colonies gives one, random treasure chests gives one at a time (if you already have one you must leave it to your chest to be able to find another in random treasures). and many more that cant remember.
just hunt treasures and you ll get as many as you want if you do the above. have in mind the treasures are setted before entering the tavern and getting a map. so leave your totem in the ship's chest before entering a tavern. sooner or later you ll get them.