As most everyone has already indicated there is no 'quickie shortcut fix' to this problem. The rigging is toast and it's a safety item that needs to be properly repaired. Spend the bucks, I'm afraid...... the parted strands are a big red flag.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)