Well I always thought I'd go with the magnets or suckers route on the front, and neither seemed ideal.
So I got a reflective sticker vinyl plate to go on my OEM US smoothed grille - just not sure if to do it, or fit the shortened hard plate with velco / tape. Both are 'technically' show plates, but have proper font, size, spacing, reflectiveness, postcode, etc. Would still ping ANPR cameras if car was stolen, etc. Just not sure if I want to do it now & keep the huuge OEM number plate plinth.
It would look so much cleaner without the plinth and original plate though...