Durban — Taxi drivers are the lifeblood of the South African economy, transporting about 15 million commuters each day, and now two drivers hope to tap into this market to save their lives.KwaZulu-Natal taxi drivers Qaphelani and Sfundo, who asked to withhold their surnames, have been diagnosed with life-threatening blood disorders and desperately need matching stem cell donors to give them a second lease on life.DKMS Africa, a non-profit organisation dedicated to the fight against blood cancer and blood disorders, say in South Africa blood cancers are 20-50% more common in men than in…