This is not something I've ever heard of.
Some of the waters in Central America are very close to those found in the Rift lakes additionally with many generations of both African and Central American cichlids being bred in captivity the differences become negligible. I’m not so sure there are as many absolutes as we once thought. With some of the more generalized species sharing a similar morphology the possibility may not be as far fetched as it might seem. Having said this, the chances seem remote at best, just maybe not completely impossible. Not something I put any effort in trying, hitting the right combination of species isn’t going to happen overnight if a right combination even exists.