The website www.eatwild.com lists a number of small, California grass-fed meat producers, many of whom are on the North Coast. Perhaps if you contact sopme of them, they can sell direct and/or advise you about where their products are available.
Please see this post from a few years ago. Don't know if the info is current:
You may also want to go to the California (not Bay Area) board and type
Mendocino meat (or Willits or Ukiah)as your search terms. A few things
came up when I did that. I also used Google and more things turned up.
Good luck and have fun.