I saw a bumper sticker the other day that said: No longer lean, No longer mean, but still a marine. I loved it. I would have liked to ask the guy driving the car where he got it. He was probably in his 50s.
Try Sgt. Grit at
http://www.grunt.com/
This site sells hundreds of bumper stickers and other Marine items.
Another is The Catalog of Marine Corps Gifts and Books at
http://www.mca-marines.org.
The bumper sticker you're interested in is in this catalog.
I would have liked to ask the guy driving the car where he got it.
__________________________________________________________
Someone here on Freerepublic has instructions for making magnetic "stickers" for your care.
Craft shops carry the "Paper" and you run it through your printer.