I had a 2010 Cooper S (R56) and purchased a license plate frame that bolts into the tow hook receiver on the front of the car so I wouldn't have to drill holes in the bumper cover. This is it:
https://www.cravenspeed.com/the-platypu ... e-mount-2/. When I bought my 2021 Cooper S I assumed the same mount would fit, but of course it doesn't.
I would happily send it to you free of charge if you pay for shipping via PayPal or some other means. Or, I am in KC and could arrange to meet you somewhere. I hate throwing stuff in the landfill, but that's where it'll end up if I can't find someone who can use it.