Looking for 2+ BR in San Francisco under $3500

I am a second-year PhD in education and I'm looking for a 2-3 bedroom place in San Francisco for myself and two other people. The others are my girlfriend, a MacArthur-appointed fellow leading the Learning Labs in Libraries and Museums network at the National Writing Project in Berkeley, and Chris, who's a documentary filmmaker pursuing his MFA at Stanford. Our budget maxes out at $3500 and we are hoping to be near Caltrain/BART. If you've got something available please get in touch!