I don't know how to direct you, but there is a picture of one on this site. I found it by googling "third air division 100 mission pin" or perhaps "3rd air division 100 mission pin". I was contacted by Cookieman and have arranged a trade for his pin, so this has been a successful post.
I am looking to buy a Vietnam era 3rd Air Division 100 mission lapel pin to replace the one I was given. It is round with a blue enamel background, silver lettering and aircraft image. I believe I saw one on this site by someone named Cookieman. I think that was the name, not sure. I am new here and don't know how to contact that person. My email is <email@example.com> Thanks