https://h-cargo-store.com/?all_items=true&page=2 This is a Japanese site with quite a few interesting accessories for kei trucks it is in Japan and things are a bit expensive.. And it is Japanese, but most browsers have built in translation, which makes it less of a problem. But it gave me some good ideas to fabricate. The bed extender, tailgate step is looking very interesting. As are their tool boxes.
The Bungie cords are stamped Made in the USA https://h-cargo-store.com/items/5c56a1863b63656c887fd864 Ought be able to find the manufacturer of those and save on shipping them both ways.
I believe it is a Tekton 62089! https://www.nextadventure.net/catalog/product/view/id/154852/s/tekton-36-inch-pu-bungee-strap/
and googleing that part number comes up with garage journal thread that suggests they are Better Bungee brand https://www.thebetterbungee.com/products/slotted-strap/