I wish I knew...there are tons of them out there. I live in Pleasant Hill, so my suggestion is that you check in with New Pieces in Berkeley, or Cotton Patch in Lafayette, or Thimble Creek in Concord to see if they have any flyers, or if the ladies working have any suggestions. East Bay Heritage Quilters has a website (don't have it off hand, but it's an easy google search) and they may have some info.
Good luck, and be sure to let us know if you find one!