String or chord for garden use (New Costessey NR5)

Hello all
Thanks for looking at this. I'm hoping to be given a fair length of stout string or nylon chord. I will be using it in my garden for assorted structures like runner bean tripods. Some times there are forgotten balls of string or chord no longer needed in sheds or household draws or boxes. I can collect within a five mile radius of NR5, ( New Costessey).