Hello Hans,
I MAY be able to help you, next (southern) winter. I've had this species for about 6 years I think and it set a little seed for the first time after its 2007 flowering. There were only 5 capsules but they had good seed in and in fact, I'm planning to pot the seedlings today. So, if it sets more seed and if you can't get it elsewhere and if you don't mind waiting for about 6 months, I'll do what I can. No promises, but I'll try.