How many conductors are in the cable? ethernet cable has 8 pairs and could possibly be used to replace the existing cable. You can get large amounts of this for a pretty good price. be sure to "ring out"(put a meter on the ends of each wire to be sure there is continuity) each conductor prior to connection.
https://www.google.com/search?q=ethernet+cable&tbm=isch&tbo=u&source=univ&sa=X&ei=JanMUv7FHqrj2wXBh4DIAg&ved=0CI8BELAE