Tires... I got lucky last winter with some Pirelli P4s that will go on wifey's car next spring. Also got some barely used Lionharts that I ran on my car just to "use up." The time to buy was 8 months ago though.
I have a stock of 2nd gen prius parts that don't fit any of my daily drivers. Needed one cheap front wheel bearing, bought a pack of two on ebay, that sort of thing. Coil packs, TPMS sensors, oops, overdid a little.
Gasoline you will probably be fine with, there are dozens of discrete supply chains that can cover for each other in that regard. If it gets really bad they can waive the RVP requirements-- they did after Katrina. The problems we are having are with one-off parts with only one "just in time" supply chain that breaks.