It's the same here in Tennessee. You can go to a auto graphics shop or any shop that makes signs and they will be able to make it for you. If you design something on the computer they can load it in a program and cut out exactly what you have made at whatever size you want. If you can not find a shop, go by your local police station and ask them who does the cars for them. They will have a local shop that does all of their lettering and graphics.
Zig