Genus Calystegia: Califonia Morning Glory (bindweed)

Hello, I am a collector of California morning glories. I have Calystegia occidentalis and Calystegia macrostegia both from Catalina Island and am willing to share seed of what I have or pay in advance // purchase for someone to collect seed, I know where these 2 are from the Calflora site. I am after 3 seeds of Calystegia peirsonii and Calystegia stebbinsii or any other rare Califonia Calystegia The reason is to build up a seed stock of these rare 'bindweeds' before they head towards extinction, and also the fact I like genus Calystegia. Currently I have managed to save the rare Calystegia affinis from Lord Howe Island and Calystegia howittorium. If in doubt I can show you my webpage. Please let me know about the above and feel free to pass my details on within any newsletter you might do, I would like to meet anyone who is interested in these 'bindweeds' Thanks in advance, if you cannot provide a source or for these 'save from extinction' please let me know who can. I know you have had the driest summer in over 100 years and these Calystegia are on the brink of extinction. Regards Ray </p>