No rear bumper?? Fit a U bolt to the bumper bracket holes through rear beaver panel
No front bumper?? Horizontal steel strap with loop hole cut in at end, use original bumper irons mount.i assume as it is CAMS requirements you are asking about, it is for a track car, and no bumpers fitted.
If bumpere fitted, latest trend is loops made of orange, or blue or red ratchet strap webbing, somehow double folded and through bolted.
You know how when you buy a 50 mm ratchet, it comes with like 9 metres of strap, well cut a bit off, take it to a canvas tent industrial machinist whatever, and have it made/sewn up.
Or, just go to a auto shop that sell tow straps, and buy them!