They probably will also sell flour to you. At least here in Germany there seems to be the problem, that there isn't enough flour packaged in customer packages. Bakeries get their flour by huge sacks or even in silos, so there is no shortage of unpackaged flour.

Your local bakery also will have cake yeast and instant yeast which is really good stuff that's annoyingly hard to find at grocery stores. Cake yeast I get because it's perishable but instant yeast has little excuse other than it has to be refrigerated after you open it.