BuildASign.com is a great website where you can design your own bumper stickers, license plates, road signs, etc. I was extremely excited when I was asked to review their product. You can customize anything there to suit your needs and even upload your own pictures!
Other materials that you can choose from include static cling, art board, aluminum and corrugated plastic, just to name a few. There are several sizes to choose from and if you need it double sided (perhaps for business)then that is available too!
You can go crazy customizing things from street signs to art work to business materials. Shipping was quick and I received our artwork much quicker than expected. All in all, I am extremely happy with our product and highly recommend BuildASign.com.
So, what are you waiting for? Go check it out and have fun!