I must admit, I don't have much information regarding South American alt-histories. What colours I do have for the area is very much a bare-bones, able to cover only a small bit of OTL history. If you've got any good repositories of information so I can find the most common alternate nation-states, I'd be interested.
Polandball. They have as complete a list as I can tell of current breakaway regions and nationless minorities that I have yet seen. Many areas you have covered, but some could use their own color if you think it's necessary. Also, Polandball, despite being difficult to decipher sometimes, is a very good way of quickly learning current diplomatic situations.
http://polandball.wikia.com/wiki/Template:Separatist_Countryballs