Does anyone have instructions on treadle tie up for a 4 harness loom

I am new to weaving and just  purchased a herald loom that was misssing the wires and was tied with very flimsy cotton wire.  From the research I have done  because of the age of the loom the wires are not available.  What can I use instead?   I would like information on what to use and how to re-tie the treadles?  Are there resources on line?