I found about three email addresses for her and a few phone numbers. Have they been tried?

Maybe some snail mail too?

Not to call into question your intentions nor methods, but I highly doubt going to this length, which sounds painfully close to doxxing someone, is what anyone that cares about him needs or wants anyone to do. If that's the degree of distance someone is seeking, perhaps they should be allowed to have it for whatever reasons they have chosen it.

People have the right to disconnect, to unplug, to go their own way, without constant interference from "well-intentioned" people that are "concerned" about them. In fact the constant harassment from these people can be enough to bring someone down. The guy here is an adult, he has the right to life his life as he pleases.

So why look at all?

I agree with you that I very strongly believe that if someone wants to be left alone they should be left alone.

I also believe attempting to connect can be done in a proper, considerate, gentle manner by the right person.