I could only suggest YouTube as a possibility. As far as downloading goes, there are some programs out there that will download YouTube vids. Try Google to find the song. I know some of the TV programs won't release the song info as I've also been in your situation and was told that it was specifically used for that one instance or show. I'm dying to get an instramental from a show and so far it's a NO GO. It was written only for that purpose.
Thats all I got. Sorry
