I searched around on the net and found www.chromelettersandnumbers.com where they sell individual chrome letters for $2.75 each,there are different styles to choose from and of course some cost more than others. Personally ,I got eight letters spelling ELECTRIC and stuck them on the back of #249 . They look good and give just the right amount of notification as to what it is. Total with shipping on the letters ,which came ,in a few days from Las Vegas was $32.00. The individual letters had to be arranged on the desk and I took a piece of tape to hold them in position.
Then took a ruler and measured the space on the car ,pealed the backing off and stuck them on. Took all of two minutes.