I collected a little bit of seed of D. rotundifolia during my trip to a Darlingtonia habitat in Northern California back in 2007. I can give you one of my dormant plants (I only have 3 available) if you want it. —As Californian native as it gets.
Will you be at the BACPS meet-up this Saturday Jan. 9th at UC Berkley Botanical Gardens? I could trade it there? Or I could put it in zip-lock back and send it in a little cushioned box through the mail. PM if interested.