I bought all new rigging from Rigging Only 2 -3 years ago. I ordered the turnbuckles, wire and Sta-Loc ends; assembled it myself. Saved a bunch of $$ doing it that way. Though in credit, I did show WestMarine my parts quote, they were willing to match it... Just 4-6 weeks later for the parts (not in stock). I had my order from RO by the end of the week. If you don't have a way to cleanly cut the wire (I used an air die grinder with thin cut off wheel, what I had in the shop that would work); Don't attempt it. You will end up fraying or smashing and fraying the wire ends and you are screwed. There are also specially made cable / wire cutters that shear rather than smash for the same purpose. Never tried them as I have other tools. I would also recommend wrapping several layers of electrical tape over the cut zone, it prevents the wire from unraveling as it is cut. Just my .02 worth.
Nik