Try some Femminello lemons, if you can find them. They are not supposed to be commercially available in California, but the three times I purchased them they were found at Monterey Market in Berkeley. They may have been from local trees of which there are a few in Berkeley. I know Alice Waters had some on her menu in the early-mid '80s, and at that time she was purchasing produce from folks growing items in their backyards in the East Bay.