One mobile abridged library, comin' up

My new used Oldsmobile, a.k.a. Harold the Hoopty Car, desperately needs a bumper sticker. Originally, I was going to order a Trogdor the Burninator thing, but you can only get it as part of a $12 four-pak, and they're charging something like five bucks in shipping, aaaaaaaand I'm not going there, thank you. Plan #2 was to scan in the "Harold the Hoopty Car" card from our Chez Geek set, enlarge it somewhat, get it copied onto a full-sheet magnet, and cut it out, but I don't know how weatherproof it would be. Plan #3—rifling through random catalogs—is excellent for reminding yourself of how many craptastic bumper stickers are on the market today.

Congratulations, dear reader. You've officially been designated Plan #4.

Any suggestions as to where I might be able to procure a good sticker or two? Any and all suggestions will be considered.