We had a thread going on this last year but I'm damned if I can find it now. The Wichard was mentioned and I threw in the thing we use which is a climbers thinga me whatsit. Someone else then suggested a climbers thinga me whatsit with horns. It is rigged and works in much the same fasion as the Wichard but at 10% of the price.
I've not found the horny wee beastie as yet but the gelded version has worked for us within reason. I say within reason cos I've not had need to do a crash bang in over 20 knots.
Anywho .. to answer the OQ ... we use sheet line. Stretchy would be a worry I would have thought.