Interesting.
The door lock on a Mangusta is a very close cousin to a Pantera trunk lock, pictured in the photo.
As some of you may recall, I have figured out how to re-key both door locks and trunk locks for the Pantera. The door and trunk lock cylinders both use the same pin and spring combination
As the other photo shows, the lock cylinder is a somewhat unique construction in that it does not use round pins but instead flat, stamped steel pins.
To remove the retaining pin I drill a small diameter hole immediately outside the pin, but angled into the pin. Once you have drilled a small divot into the actual pin, you should be able to take a small probe like a dental pick and pry the pin out of the housing.
Two more things:
Why do you want to remove the lock cylinder?
Can I be of any assistance in your project?
Larry