I don't know where you're located elptacek but, when I worked in Barrington, I stopped quite often at Edelweiss Deli, located on Northwest Highway in Palatine. My daughter was addicted to their pretzel rolls. They have a huge selection of german sausages and other meats. They also have a pretty impressive grocery section with flours, noodles, spices, etc, not a large area, but well-stocked for a small area. They may just stock the type of flour you're looking for. You could probably just call them to see if they have the flour you're looking for and they might even order it for you if they don't have it stocked.
Edelweiss Deli
136 W. Northwest Hwy.
Palatine, IL
847-359-7030
MORE COW BELL!