Seaside towns always have ships chandlers which sell rope you can feel and check before you buy. Cowes in the Isle of Wight is just such a place where I found reasonably priced 6mm nylon rope to replace the short and joined current ropes. Also found some lovely thicker 15mm rope coloured in the traditional red whit blue sally colours which I hope to melt into the ropes to represent proper ropes. Should end up with ropes at a fraction of the cost. Could end up with eight ropes for £26!