cables not anorexic, he just uses a slim model, because that's the only asymmetrical one, which is useful for cable. now that we have some meshers back, maybe someone could make cable skins with anatomical references similar to a rhinoceros, but thats for a different thread.
there is no mephisto mod (or a black cat, uatu or weapon Ω mods on that note) there was one in progress a while ago though. i think mephisto and uatu were originaly made to replace npc skins.