I don't think you can find it in SF. Not at Wallas or Smoke Time at 24th and Mission. Not in Chinatown - I checked Grant, Stockton, and a few cross streets. Not at the tobacconist at Polk and California (they have real Swedish snus, so I figured if anyone would have it...)
I'll just have to wait patiently until the Njoy I ordered from Costco arrives.
Meanwhile I'm making do with snus -- Skruf Stark Los, packed with an Icetool, for the quick nicotine punch. General/Catch Dry Peppermint mini portions when I want more flavor and less nicotine.