You went down the wrong rabbit hole. He is alive and well. He's not even 70 years old today. The WWII Veteran you cited is someone else.

Besides, those letters have been posted on pinside and IPDB before. It was just a job for these people. When I kick off, I don't think my family cares about the business letters I wrote during my career. They have copies of some of my memorable (poison-pen) ones. They might care about my life insurance policies though.