Try going to
BumperStatements.com.
You can make your own bumper stickers there on-line. You can also post them on the site, enter weekly contests, send E-Sticker emails and more for free. There are hundreds of Bumper Stickers made and posted by the site users. You can get any one you make or any one posted on the site for $2.99.
Have fun, if you can say it on a bumper sticker you can say it at BumperStatements.com!