Some restaurant suppliers have opened their online store to individuals. I can't speak for California, but in New York City we just shopped yesterday on baldor[1]. For most items the minimum quantity is way to high for a single family (e.g. for potatoes you can only order 50 lbs or so). But you can still find some stuff. It's not a very pleasant online shopping experience, but it'll do for now.

[1] https://www.baldorfood.com/