defective antitheft device on my 87 Mercury Cougar

This was a custom ordered part, mach 9, with a pin that needs to be inserted to start the car, without it
the engine kills.  The pin is loose or defective, so I removed the unit and now the car is stuck at my
inlaws house.

I haven't been able to find any parts for a Mach 9 security device to replace the pin, or help removing
the unit completely.  
Also the driver's window crashed into the door today, but that is the second thing to fix.  Seems doable.

Please any info or site to order parts or  to remove the original antitheft device would be helpful