John,
As a fern, it has spores, not seeds - a whole new experience in propagation - sometimes easy, and sometimes next to impossible. And I would guess they are very slow from spore as well.
But I believe they 'pup.' And this would be the way to get some if possible. They are right on the borderline of success for SoCal. I lost the one I tried, and I've never seen one there, but wouldn't be surprised if there wasn't some successes in SoCal. I'm going to a place today that if anyone had one, they would.
I don't have one in Hawaii. But I see them. Not sure about the right way to collect fertile spore. Like I said, it is radically different experience, sometimes needing sterile conditions, because molds will wipe out your whole batch in a day or two.
I'm not sure if the "Fern Factory" is still in business. They used to have a website, and may be able to help you locate if they don't have. Otherwise try around. It should be available, somewhere.
BTW, there are other species. And you are right, it is a very impressive type of plant. Something that you would truly expect to see a dinosaur munching on.
