Yes, there are male khasiana. *We may even have one... we just got some seed raised plants from Clyde Bramblett, who has a male and female. *Recently the male may have perished (if cuttings aren't around somewhere), but he has had it for years and produced many khasiana seedlings (of which some may be male). *I think the reason that there are a ton of female khasiana around is because they are most probably the same plant.
What's going on with your blooming plants now?
They are doing very well. The khasiana is just starting to open but the only male that is open right now is the N. x maxima x fusca “elongata” so I will pollinate the first 6 to 10 flower with it and hopefully some of the other males will be open by then.