I agree with the first part involving Shisui's eye. As for Danzo's arm (both the Hashirama's cells and the sharingans) I think Oro was involved. Oro was interested in not just the Sharingan but the body that can properly control them. Only having an Uchiha could he ever gain full control of a sharingan, not the incomplete versions shown by Danzo and Kakashi.danzo said it was because of itachi that he was able to get those eyes so i dont think orochimaru was involved! only part orochimaru would be involved in is giving danzo hashirama's cells. you really think if orochimaru had access to sharingans he would jus give them away?