USA TRACK AND FIELD CAR WINDOW STICKER?

I am a registered member of USA track and field. I have seen them before and I want to know how i can get a USA track and field sticker for the window of my car (not a bumper sticker though!) if there is a website please include it in your answer or give me step by step to find it somewhere else. also, ive looked in search engines and cant find it :/ thanks in advance for the help!