I know little of the topic, but there are a couple of long-running threads on Congo and Rwanda here: http://council.smallwarsjournal.com/...ead.php?t=2129

And Zimbabwe here: http://council.smallwarsjournal.com/...ead.php?t=4896

Not your specific countries, but in the right area. You may be able to judge from the posts who knows specifics about your particular interests and you might find some useful sources in the threads.