This stuff (http://www.diy.com/diy/jsp/bq/nav/nav.jsp?action=detail&fh_secondid=9372003&fh_view_size=6&fh_location=%2f%2fcatalog01%2fen_GB&fh_search=polypropylene+rope&fh_eds=ß&fh_refview=search&ts=1217843945731&isSearch=true)? Yeah, I can see why you wouldn't worry too much about cutting that... climbing rope generally runs to around £1.50 per metre, depending on thickness and stretch.