I received the same response, Motegi, and then a few days later they did reply to my message. It wasn't with good news, though:
Dear Viewer,
Thank you for taking the time to contact Discovery Networks. We appreciate
your interest in our programming and are delighted to hear from our
viewers.
Our databases contain a lot of information, such as airdates and
information on videos that are available for sale. Unfortunately, our
database does
not contain information regarding the music used in our programs or
commercials. We apologize for any inconvenience this may cause.
However, the music is usually listed in the show's opening or closing
credits. Also, we recommend directing your search to the Internet,
reviewing the discussion threads or posting your questions on the
discussion board on the Fansites section of our website.
It sounds like it might have been made especially for the commercial, and might just be a clip. Is the commercial on youtube somewhere?