I would suggest you just send the files to Don and he can post them back in the thread where they were originally intended.

There are all kinds of reasons why someone might be willing to post on FB and not here, so let's just leave it at that. I can imagine why he might not want to post here.

At the same time, if someone posts on FB and someone else takes a screenshot and posts somewhere else, well that is just how the internet world works and people are or should be aware of that.