Three months since I started this thread, and I just found out that, against all odds, they've just found a bone marrow match for my friend Emru. It doesn't mean he's out of the woods, but (as McCoy once said to Kirk) it's turned an impossible situation into a fighting chance.

It worked for Mary (of PP&M), so maybe it'll work for him.

Anyway, thanks to all those who helped spread the concept of Bone Marrow Registry.