Hi there, I am wondering if anyone can help??

I'm flying into San Francisco from the UK on Wednesday and driving cross country to New York and I need to pick up film for the journey. I am after about 20 boxes of Kodak 160/400 Portra. Can anyone suggest a good place in the Bay area to get 4x5 film? I am also hoping to buy some Fuji FP-100C Professional Instant Color Film (4x5 Glossy). Any tips?!

Many thanks,
Brendan