I had an old seatbelt, and punched two holes in a length of it, making sure that they were big enough to fit the bolt from the bracket:
…Then slipped the belt between the bracket and the body, and retorqued.
There’s some sort of a wiring harness clippy thing just to the side of the shock – I bent this out, which lets me rest the strap around it when it’s pushed back out of sight inside the bumper space.
Now, it was just a matter of reassembling the bumper back on to the shocks, and reconnecting the bellows/trim. The jack really came in handy here – the bumper is quite heavy!
Finally, snap the rubber strip back onto the bumper. You can see that some of the plugs stayed in the bumper when I pulled mine out. I had to pry these off of the bumper, and in a couple of cases separate the female and male parts of the plug on the workbench, and then replace the female into the bumper and the male onto the rubber strip. Remarkably, none were beyond repair and the trim snapped right back on. It might be worthwhile ordering a few spares if you’re the nervous type.
And we’re done with the front! The strap can be pushed back inside the rubber smile, completely out of sight. To access it, I just have to lift the rubber lip up and reach my fingers in (it can be a bit tight, but very doable) and pull the strap out. I've since added a small 'tow' triangle just in front of the rubber as well (I'll try and grab a photo of that).
The beauty of this is that it's 100% invisible when not in use, at a very accessible height for the tow truck, and free!
Next post - my solution for the back...