As Ginn0rz mentioned the Candied Skull source containing the numbered map of hidden orbs is no longer available; however, it can still be accessed using a web archive site such as waybackmachine.com. These websites take a snapshot of a webpage at a certain point in time so that it can be accessed in that state at a later time. I have included two waybackmachine.com links, one for the Candied Skull numbered hidden orb map and one for a Picasa web album containing individual pictures of each orbs location in-game. I did not create these maps or guides, I am simply providing a means to access webpages that have since been taken down. Please let me know how I can improve or clarify this solution.
Hidden Orb Numbered Map:
Hidden Orb Photo Gallery: