I have recently come to realize that there are a few wargamers out there who have not yet heard of Warflag. This is a free site that has thousands of flags, banners, standards from throughout the ages all free and ready to download. They are simply beautiful. Here is an example of thier work.
If you like what you see (and I am willing to wager that you will) hit the support button in the upper right of the frame. This is a valuable resource and I would hate to see it fail for lack of finances.