Apologies, work if frantic at the moment.
Forgot to take a photo, but it’s basically a longer version of the magnetic metal mounting strip the 4C comes with. As mentioned in the previous posts, I had made a clunky mount. But then decided I was reinventing the wheel.
So I got a thin metal magnetic strip from eBay, bent it to stick out from the monitor (1cm) and use the mounting pads on the 4C – I stuck the metal strip to the monitor (I had to remove the ‘Predator’ badge) with industrial glue.
The metal strip looks like the profile in the photo below: