I have always used
3/8" nylon 3 strand twisted rope and nylon thimbles. As mentioned earlier, there is not much load on the lazy jacks.If I were you, I would either A: replace with same vinyl covered 1/8" or B: replace the whole thing with either 3 strand twisted or double braided nylon. Reason being thats its purely aesthetics. To me, looks do count.Tony B