Hoods are the same, but we call 'em bonnets. Like what you call the trunk we call the boot.
Dealers should be able to supply replacement vents (at a price!), not sure of the various part numbers, though.
they pop in and out
you can get black / painted / wrapped all available on ebay or as others have said, paint of wrap your current ones but that might be more expensive and additional hassle vs just buying replacement ones
What do we think? I know it’s personal preference at the end of the day, but aren’t bonnet vents there to stand out as well as functionality? So gloss black or body colour?