For sources of Liberty ship photographs, see this page: http://www.usmm.org/photosource.html. You best bet is Mr. Hultgren who specializes in Liberty ship photographs. I know enough about his collection to know that he apparently has an image of S.S. GEORGE LEONARD. He is quite elderly (so time is of the essence her too) but at last report was still actively managing his collection. There will be a fee for a copy but I don't know what it is.
Ron Carlson, Webmaster
Armed Guard / Merchant Marine website