what kind? car audio you can usually get some thru the manufacture if you give them a call or sometimes local audio stores will give/sell you some. just wondering, why you want them? imo all decals are are "steal me" signs.
The majority I see come with the products...of course you can purchase them from ebay or the manufacturers themselves. I'm with ctmike on this one...they're 'steal me' signs and don't look that great anyway