https://www.goodeggs.com/sfbay/dinner-kits
We use produce and groceries we were already selling as parts of our kits, as well as partially prepared food we prep/cook in-house. 80% of what we sell is made within 200 miles of SF.
We also assume you have things like olive oil. Hah.
Also worth mentioning is that we hold onto produce for usually less than 24 hours from the farm to your door.
http://www.sfchronicle.com/food/article/Good-Eggs-hatches-ne...
Let me know if you'd like a beta invite to try the kits out. (Or to talk Operations Engineering (my team), it's fascinating and full of classic compsci problems)