I have been looking for the company myself. It was called Driver's Seat Investments, it was located in Rosewell Georgia. I have an old mustang monthly with an advertisement but I couldn't reach them by the phone number listed in the ad. If you find anything out please let me know as I am very interested as well. As I recall the kit was about $2400 and the labor was another $1500 (5-6 years ago).
There is a city Roswell, Ga 30076, that is just north of Atlanta. There isn't a Rosewell. No listing for that company. Perhaps a little detective work could dig up whom had the business, if there is a successor, and if inventory and service are available.