You should contact California Carnivores in Forestville, Sonoma County.
Although they grow and sell carnivorous plants from all over, they also
usually have at least some of the species grown from California
origins--besides Darlingtonia, there are two sundews, a butterwort, and
(according to Munz) four and possibly five bladderworts native to
California. There is also a book, "Carnivorous plants of California," by
J.H. Rondeau (published privately), available from California Carnivores
(standard disclaimers on both the book and the nursery)
Sean Barry