Can't help with a dew rag, but paid $2 (70% off sale) for a blue ball hat with a British Flag. Found it, last week while I was looking around in Steve & Barry's at the mall. The hat is fitted, and it stays-on at speed if turned around. The patch is worth $2 if you want to sew it on a vest or shirt.
http://www.steveandbarrys.com/
