The 4 horsemen predators was a story told by Uratz, the one you read. All concepts and bios were created by him. The only person that would have images of any kind, other than the ones on here, is Uratz. What I can suggest is to see if you can get his email from his profile and ask him for any concept drawings he made of Death. Failing that, you could use the concepts and the bio shown in the story thread and create your own version of Cetanu.