I had the wrong N number in my original answer post, pardon my typo, but the right N number information from the FAA data base, and the FAA has it wrong as an A-2A, vice the correct A2-A nomenclature. Still, it is deregistered and the last owner info is there. He might know why it is deregistered.
If you can no longer get ahold of the last owner-(perhaps he moved) soliciting the full FAA records of ownership of the Mooney A2-A Cadet or query an aviation title search service. Some have been known to provide aircraft trace information for free. That's been documented here in the Forum before. This Forum is a long shot in getting your answers. Please go to the exact info sources.