Steve D,
I agree with your update.
I met with Mr. Brown and his son at a fall Carlisle meet some years ago and after he had sold to L-B. They were set up on spaces just a few down from me and had some king of an old farm machinery/tractor and other stuff they selling. At least to best of my memory it was his son with him.
He made fine products for our old Chevrolets.
Anyhow, I and several of us other vendors were talking to him and he told us all about the Hampton Coach Company. He and son were very accomodating regarding their business and the reason for selling. The reason was just as you stated.
I'm sorry to hear about his passing.
Best,
Charlie