Well, fyi I am currently in Nairobi doing my PPL's and there are only a few tail draggers I have seen knocking about, but they are privately owned. All schools in this area are 152 and 172's
http://www.aeroclubea.com/contacts.htm these guys might well be worth an email, seem to know who's who and what's what around here.
Uganda Might be worth a look as well ?
http://www.flyuganda.com/pilot_training.php
Again, excellent responses from them when I made initial enquires, so might be worth an email in there direction