Hoping that some kind soul can help - my current plates have text saying "fiat coupe LE" on the bottom but they're starting to get the black condensation marks behind the facing. Can someone please PM me if they can point me in the right direction of someone who could replicate the same. I don't need advice or comments on the legalities please as I know the score hence the request to PM.

Just look up Show Plates on google. I have used Craigs Plates in the past and got a nice set of plates with custom writing where the dealer details go. Of course these have been on the car since before the rules changed

So long as you are using the proper legal font and layout i cannot see the boys in blue hassling you. MOT inspectors just want to see proper spacing and a clean plate.