I got one from an ordinary plate shop. Used motorbike letters on a custom sized yellow surround. I even got them to make up the frony one. M bike letters with the smallest possible plate they would fit onto
You may or may not know about this site but check it out http://www.gtgrafix.co.uk They are excellent. I got a set of front and back import size and shape plates made up. You can specify size if you like but then it might not be legal but they do custom lettering like carbon fibre effect and 3d effect as well as loads of other stuff. Use the custom registration plate designer and see how your custom plates will look. Add your own logo or pick from the selection available. Just click on vehicle accessories to enter the reg designer part of the site.
hi mate, there is a company in edinburgh called scotrad(sorry mot got number handy,they are in gorgie) they make any shape or size for trade. try them and if thy wont sell thm to you give me a call and ill get them for you. im in edinburgh.