I think we can safely say that RVSM will not be seen in Africa south of the Sahara in our lifetime.
Countries can't afford to hire and train ATCs let alone buy radios, radars etc etc. SA might be the only place where RVSM might have a chance, but I doubt it has any real priority. The traffic doesn't really warrant it.
As far as the rest of Africa is concerned: The infrastucture is too lacking to even think of RVSM. The gap is just too big.....