Update: While looking through the paper documents for the Annual I found a spare set of keys.
Had our local locksmith (Mr. Minit) make new ones ( 3 sets). He immediately identified them as airplane keys. Had to order them from Italy…
Thought the Meyers was the Jaguar of the skies, not the Ferrari.
@Mark: Can your A&P give a source for the lock? Could be added to the Maintenance Manual..
Thanks for your input.