I'm in the same boat, so to speak. The vinyl lifelines I have are now leg graters if you rub against them. My wife found out the hard way.
I just have a 22' trailer sailer, with small holes on the stanchions. I'm not sure what I'd be able to get that would fit, and if there would be much of a difference in cost. I'll have to go to the local rigging store (about 2.5 hours away) and price things out, I think.
I did my former cal 25-2 with 3/16" Dyneema. Used SS turnbuckles to tension and manage creep. Spliced the Dyneema on SS thimbles to avoid chaffing on the turnbuckles. Was as good as new when I sold the boat 5 years later. Currently considering the same thing for my Jonmeri 33 (only for cosmetic reasons)