Thank you all for keeping this man's thread bumped up. I think of him often, and of the loved ones who may be missing him. I hope we hear news soon.
If you have some links to active USMC FB groups or pages, I would just go ahead and post a pic of the flyer on the page, without waiting for permission (assuming it is an open group) from the page owner. If they don't want it, they'll just delete it, but one would hope they keep it up there to help ID him.
Or maybe send a FB message to one of the more active posters on the pages, asking if s/he will post it for you?