Having more than one genetically unique selection represent a "cultivar" is not breaking the rules as far as defining a cultivar is concerned.
My N. miranda is about to flower again (known male), but it will probably be at least 2 week until pollen development...
I have also heard mixed stories on whether or not the pollen is viable (not sterile). Some seem to say they have successfully used it in pollinating, other say it is sterile... anyone else have more input?
I won't mind trying it on a couple flowers. Fire away.