As you know, the S. beraviensis is not self fertile .. in order to get seeds you have to have a different species like S. campanulata.
I'm wondering if microwaving the pollen could overcome this. Since the Stictocardia starts blooming in Winter, how about trying the microwaved pollen technique. So far it's worked on Albuca spiralis and Hibiscus moscheutos for me and I'll also be trying it on all of my Southern Hemisphere plants that bloom in Winter like my Seemannia sylvatica. It would be great to get a list going of plants this technique works on.
Here is the link to the thread on how to do it.
The thread "Microwaving Pollen" in
Propagation forum