http://www.oneworld.com/ffp/lounge-a...ungeaccess/SFO
You could also try the CX or BA lounge, if they are still open then. Otherwise, your only option would be JL Sakura lounge. Technically, you are entitled to access the CX and BA lounges if they are still open at your flight time but they could deny you access if they are very busy at that particular time.