Made in the USA too! Been wanting to look for some and came across this so going to get some free ones and if they work well then I will definitely support them and order some more. But if anyone is looking for some or just wants some because why not here ya go!
http://www.usa-traffic-signs.com/Flag_s/55.htm
directions below - SASE = Self addressed stamped envelope
Mail your SASE to:
USA Traffic Signs
c/o Free Flags
33 Miles Street
Binghamton, NY 13905