LOL... have you guys never seen stickers before?
There are three in a pack, stick them to the back of the plate, and they have a powerful adhesive.
TT... in evo magazine, their old Caterham used these sticky pads (but they kept falling off)

... they seem to work well on my dad's merc
You can also get decals, but they look shit as they are smooth over the body.
But maybe the stick pads won't work... your plates are metal, and therefore heavier.
BTW - ask a dealer who has no hole in his plate what he uses