What? You don’t want to style two clamshell pieces of plastic and a screen bezel anymore? The horror!
Camelbak is a good suggestion. They are in Petaluma as yo mentioned. Spoke with their design head a few years ago, they have a solid organization and respect for designers.
Specialized Bicycle - Morgan Hill - many designers doing different things
Bell/Giro/Easton, Fox Racing, Zero Motorcycles - Scotts Valley
Isn’t The North Face based out of SF?
Pottery Barn/W-S is in SF
I think the Hello Kitty design offices are somewhere around Candlestick Park area.