Do you need a long line? We have a new 32+ metre length of 12mm white 3 strand nylon rope left over and it’s now for sale @ £26 including postage to std UK destinations. It weighs 3.1Kgs . It does fit through standard Mac cleats and wraps around to lock off.
If you don’t have a hot knife but want it cut to length, let me know how long you want it cut to.
Keith. Star 26M