Aside from Whole Foods, Amazon also has Amazon Prime Now (go to https://primenow.amazon.com/ and pick store: Amazon). They have a lot of staple foods there, and sometimes they have more availability than Whole Foods. (I'm guessing there might be different bottlenecks at Whole Foods stores and Amazon warehouses.)

Another option are restaurant deliveries. Those are easy to get (they're happy to get the orders!). Up to you how you feel about the risk, but all the experts I've read say you can reduce the danger there to something comparable to grocery delivery (mainly to discard the original packages and you can also reheat the food).