Cash and Carry on San Carlos in San Jose has a decent selection of flour. I saw pendleton, General Mills H&R, and some other unique brands. They had a "special pizza mix" from Pendleton Mills, but I have never tried it so I don't know what type of pizza it will produce.
They also sell GALILLEO PREMIUM pepperoni. I have found this to be quite different than the greasy Gallo pepperoni sold in most grocery stores. It's less spicy, much more flavorful and cooks to a nice red color.