Are you looking for the current owner of the 912 or 912E you’ve owned …. or you Dad’s 912 ?
Or do you want to know about the whereabouts of the 912 you’ve owned, …want to buy it back if possible? Or do you still have documentation from a 912 you’ve sold and you want to reunite it with the car?
Give it a try and ask overhere.
It is always a long shot, but with some luck someone might be able to help you out.
If you’re not willing to show your address / phone-number on the internet I can be your contact-person.