West Marine in Sausalito is open (they have hardware store exemption as an essential business).
When I went two days ago, they were only allowing one customer in the store at a time and had tape on the floor denoting required distance from the clerk...
In any case, they have every tackle item you could need, plus frozen anchovies (tray), frozen sardines, frozen herring, frozen grass / ghost shrimp, and frozen mackerel.
However, I am still seriously in need of live bait right now... baited sabikis have mostly produced large perch and small brown rockfish, and even when I resorted to buying a trap to catch my own bullheads / shiner / smelt, it has still be very tough going.