The thread is two years old, but it is a start. Let me know if you have any luck. BTW, someone in the Reddit thread points out that cash sent through the mail _will_ be stolen, so if anyone wanted to send him money, we'd have to me more clever about it.
Yes, when I first read the story I was kind of scared when thinking what could happen if he would just think "my duty is to pass the warning, higher ups would sort it out". Now of course everybody says "we'd caught it up anyway", but who knows what would actually happen.
https://en.wikipedia.org/wiki/Stanislav_Petrov