Originally Posted by 99ford
Look at LoJack its better than alarm.
KarrTrack has something better than a LoJack. They'll install a GPS tracker so you can find your car if it's stolen, plus the shutdown feature that LoJack provides. Their GPS will also tell you where the car has been, where it went, and how fast it was going inbetween. You can also set Safety Zones that will alert you if your car leaves or enters them.
These guys will even schedule an appointment to come to you (provided you have work space available) or meet you at a dealership to do the installation.
I don't know exactly how you would get ahold of them to initiate the purchase because I just got mine purchased/installed when I bought The Mustang last week.
Edit: When i get home from work in a few hours, I'll check my paper work and provide a website or phone number for you.