If you are looking for grapes, check out http://www.winegrapes.amadorwinemakers.org (or click on Find Wine Grapes). I'm always updating and adding new entries.
Mike Bellamy also sent me the following links. Please give them a look: http://www.matsongrapes.com and http://www.fentonherriott.com

This story is from the SF Chronicle. The original article can be found
HERE

This story was in error in stating that grafted vines from the Original Grandpere Vineyard were planted in Renwood Winery's Grandpere Vineyard. In fact, vine cuttings were taken from the Original Grandpere Vineyard, self-rooted in a Renwood nursery for a year, then replanted and head-pruned in Renwood's Grandpere Vineyard.