Four Dot do these plates, so you can have a short plate in a standard mount;
Four Dot sell plates that are standard size to fit the front mount, but can be made with a background of your choice with a minimum legal width plate. Here's mine. Very nicely made, with simple black borders, small carbon fibre background, and a GB roundel on the rear plate. You can go fairly wild if you want with your own design though.Thanks very much and think I will do the same...