A few days ago, we started offering flour assortments on the Pizza Bible Store: http://store.thepizzabible.com/collections/all/flour-assortments
We noticed a few things after the Book was released and the store went live. First, people might be able to find one or two of the flours mentioned in the book, but not all of them. And second, people who were learning about pizza making had a hard time choosing between flours.
We're starting out with a High Gluten flour and a Pizza Bible flour assortment. Each contains four 2.5 pound bags of flour. If there are assortments, or flours you'd like to see on the store, please do let us know here.