Below are links I found for the best images I could locate. I don’t know if any of them are subject to copyright restrictions, poting restrictions, etc.
Large image of all 4 men killed:
http://www.bookwormroom.com/wp-content/uploads/2012/10/Desktop2.jpg
Sean Smith:
http://imageshack.us/a/img543/8209/1seansmith.jpg
Ambassador Stevens:
http://dailyrepublic.s3.amazonaws.com/wp-content/uploads/2012/09/13a1-stevens-mug-cl1-705x1024.jpg
Glen Doherty (2 - very similar):
Tyrone Woods:
http://media.10news.com/photo/2012/09/18/tyrone_woods_1348036286764_138599_ver1.0_640_480.jpg
Obama logo:
http://wttg.images.worldnow.com/images/18985708_BG1.jpg
“posting restrictions” - typo - sorry...