This is just the way it goes with cichlids in a community tank. If you end up with a pair, you end up with the situation you're in. If it were me, I would test the waters selling them or trading them as a mated pair. If you don't want to deal with shipping them, you can list them on Aquabid as a Pickup only sale. There are local clubs that may be another avenue for finding a buyer. If you can't find a taker, splitting them would be my second choice, knowing that one or both have the potential for becoming tank bullies. Just about any LFS will take them off your hands and sell them as a pair, but don't expect much, if anything, in return.