Larry Vanderaa worked in Mali. The Islam he found there did not match what he had been taught to expect. He let the local teacher teach him. To see what he learned, see his Kingdom Communities paper.
At the popular level, ordinary people seek out Sufi masters to obtain baraka, blessing. Alan Howell reflects on his expereinces in Mozambique. Here
If you know of anything relevant to mission to Sufis in Africa, please get in touch.