The image used for the Childkiller reputation in the final version of Fallout 2 is the same as for the Hated reputation. As it turns out, a special image for Childkiller was created but was never used. Brian Menze, the artist who made it, shows it on his DeviantArt page and explains why.
This image was unused and the only Vault Boy image to ever be cut from Fallout 2. (I'm sure you can figure out why) I remember when I got the request to do a perk illustration for "child Killer" that there would be no way to keep in from being offensive. I mean really! how do you make an illustration of "child killer" and keep it from being offensive? Anyway for some reason, I thought this was the least offensive way to do it. I have no idea what i was thinking. Even the designer who requested it realized it was a bad idea, so we nixed it. Looking back on it now, I can't beleive I drew this.”
Aside from that, Brian Menze has published other high-quality Vault Boy images and concept art for games like Knights of the Old Republic II and Alpha Protocol on in his DeviantArt gallery.