it's the piece that dangles off a key ring that is not a key. I'm going to guess that he's reffering to a key fob for keyless entry. In which case you might find a working used on on ebay, you could also try majestic http://www.hondaautomotiveparts.com/home.htm

BTW, if you include some specifics in a post you're more likely to get a useful reply, but try not to write a book either