If you find yourself in Boonville (or on your way through), be sure to check out the Stella Cadente Olive Oil tasting bar in the winery tasting room next to the Boonville General Store.
They produce three extra virgin oils (Estate Blend, Early Harvest Mission and Everyday Late Harvest Mission), as well as a Meyer lemon oil.
They sell in bulk at the tasting room (bring your own bottles or they have pint & quart jars available). They also sell some prepackaged bottles (also saw this for sale at the Yorkville Cellars Winery) but the price is better in bulk.
Really delicious stuff!
And farther down 128, Navarro is now selling a very summery rose wine - if you like French roses, I'd recommend checking this out. And like most of their wine, it's probably only available at the tasting room or by mail order.