I have thought about it but I think these, at least how they are currently made and coated would be pretty pricey. When I made them I machined 18 tie downs for three trucks and sent them out for coating. total material + coating cost was around $350 for all, not including cutters and machine...
I ended up getting fed up with the stock tie downs, both in quantity and the function. I found it very easy for tie downs to fall out of the hooks when walking around the truck strapping down loads.
Here’s what I came up with
parts are milled from steel and electrodeless nickel coated