So sorry you are having to endure this pain of not knowing where your kitty is. He is such a beautiful kitty and is clearly loved very deeply. There is an animal communicator, Hilary Renaissance, who specializes in helping to locate lost pets. Her information is available at http://www.calmpet.com. I attended a workshop that she taught several years ago.
If you can start looking where he was last seen, talking to anyone who might have seen him, think about what he likes and where he would be likely to go — then go out and call his name. Keep calling for him and focus intently upon him. Also check with any local animal rescue organizations, veterinarians, etc. If you have a website for your area to post information about lost pets, this could be a valuable lead.
Prayers for your kitty’s safe returns. Many Blessings–