You could do like did and buy one of those ugly orange triangle style bike flags - they come with mounting hardware and put your own flag over the top of it. I bought one of those American flags made for attaching to your car window and removed it from its' mount. Then I rolled up the ugly orange flag and slid the Stars and Stripes over it and sewed it in place. Voila, a patriotic bike flag. I have yet to see one anywhere like it and get a kick out of people who salute when I ride by.

Andy