I, too, would be willing to help to try and find the family. It's a beautiful machine, to be sure! Congrats on getting it!
As for Mom and "Amelia"...if Amelia is the wife, then by all means she should have known first, however she should have called his mother as soon as she knew! Often the men/women went on short notice, and there was little time to notify family. I know if it was my husband, and he chose to notify his mother and not me, there might be a little hell to pay!! As a mom, I would expect my son's wife to know before I did...natural order of things and all...