Thanks. Sorry to learn. I was hoping that wasn't going to be the case.
The other fellow I e-mailed, was Gerry Gore (no reply).
People change e-mails all the time. But, I haven't been able to track him down anywhere.
Well, the boards have been scanned (both sides) just in case (?); now I'll build it, and see what happens...
Since Gerry and I corresponded quite a bit about this project: I'm fortunate enough to have lots of Info, parts list, schematics, hints & tips.
I'll document the build process on this little blog I just started -
https://lightningdetectors.blogspot.com/(in case anyone is interested)