I saw them yesterday at the checkout stand and went back to buy some today. Not cheap at $5.99/lb., but such a rare treat that I couldn't resist. They're a little hard to find. As you enter the produce section (from the front of the store) they're on a shelf on your left, next to the strawberries.
Also notable: they have cleaned smelts with the heads removed for $2.49/lb, which they will expertly fry for you for no added charge.
4175 Mission Street, just a few blocks north of Silver