I have a few obscure hybrids.

Have you looked at gingersrus website he has much information on locations and names of nursery's and suppliers. Although some are no longer in business there is a wealth of information and links. I have purchased 20 hedychiums this year from him all are doing well. Mine are not mature enough yet to trade and only have about five varieties other than the new ones. I would love to know what varieties you have though for possible future trades.
James Maloy

guess it depends on what hybrids you are looking for?