We use a lot of bungee cords in the warehouse and none of the commercially available bungee cords would last more than a year. So we bought a roll of industrial bungee cord and made up our own. Here is the video of how we did it. We also sell the bungee cord on the website.
Also watch our most popular video, "How To Fix A Leak In PVC Pipe" (for free):
https://www.youtube.com/watch?v=wo-R0oqnMpc