I have stored a bunch of PhotoShopped pictures of LOST characters that I found on the Internet. The composite of the characters' older persona, you can view here in my blog, as well as the small version of Ben's picture. The rest you will have to go to this site: http://michaelemerson.net/coppermine/. Click on the album, "Lost--When They Get to Be Old."
(I love Ben's older version. He was actually given a pudgy belly. LOL)