I Found some sick replacements or a new skin for a zombie...
http://www.fpsbanana.com/skins/64370
Would be awesome to see a terminator chaseing me
http://www.fpsbanana.com/skins/34918
http://www.fpsbanana.com/skins/33480
http://www.fpsbanana.com/skins/games/72 - basically anything on this page works to looo.