Peter,
I know of a company here in the UK who specialise in cables etc. It may be worth dropping them an email with your requirements, their details are:-
CABLE TEC
Unit B Junction Mills, Kirkby Folly Road, Sutton-in-Ashfield, Nottingham, NG17 5HN, England
Website:
www.cable-tec.co.uk
Telephone: +44 01623 440398
E-mail:
sales@cable-tec.co.uk
Regards
Brian