In my misguided youth I spent a lot of years sailing and what I did when relplacing lifelines was to use coated stainless wire rope and nicopress eyes with thimbles where needed. You don't need the large handled nicopress tool to crimp the sleaves. There is also a press that looks like a tubing flaring tool that is relatively cheap. I actually stumbled into my old one from the 70s while cleaning the shop the other day. Using the cheap tool takes a bit longer but it isn't like you are replacing the lifelines everyday. I just googled nicompress and saw an ad for the cheap tool at $27. I hope this helps. Maybe I am just old fashion but I wouldn't trust plastic materials exposed to sunlight in the long term.