My friend Ember is now making these custom size and color vinyl decals that are safe for paint and windows. Check out her eBay listing:
http://ebay.com/ebaymotors/COBRASTAR-Lincoln-Cobra-Star-Vinyl-Decal-CUSTOM_W0QQcmdZViewItemQQhashZitem20b02b42d0QQitemZ140394578640QQptZApparelQ5fMerchandise...