Ours are what looks like standard yachtbraid type line from the mast to the second split, and shock cord after that. No blocks, just eye splices.
I'm sure that you could rig what you need with what you have.
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)