This is what the Ford Canada website tells you about the package (CDN$700). It may not be practical to have the dealer add it or if it is even possible. I know on my car it has a slope sensor, so if it detects it being lifted, the alarm go off. I even set it off when I lifted one corner with the jack to put the winter tires on.
The Enhanced Security Package is standard on Mustang Convertibles and available on various Fastback models. It features an electronic locking centre console, electronic steering-column lock, active Anti-Theft System and wheel locking kit. The wheel locking kit includes one unique locking lug nut per wheel.