Well, a few minutes on Google confirmed your suspicions: it is NOT a factory limo. The car is owned by Brad Fakeley in Canada. Here's the story:
"Gary Fakeley [Brad's father] said three hobbyists in Wyoming built the limousine about 15 years ago, using parts from four Edsels. About 4,000 hours worth of work went into building the car which has a vinyl roof and ripple-free black paint.
The vehicle has room for five in the rear and power-operated window to divide the driver and passenger area. Passengers can talk to the driver via telephone. A television built into the rear-seat console provides entertainment for the occupants."
Source:
http://www.canada.com/story_print.html?id=1937bf92-beed-44be-97d5-baa4d2f2bbd1&sponsor=