Contacting Michael Moorcock or his Publishers

Greetings, friends. I've been commissioned to translate The Elric Saga, and I need some help regarding the proper pronunciation of some names and locations as Michael Moorcock intended, inorder to make my final work as faithful as possible. Is there a way to contact Mr Moorcock or his Publishers or anyone who might be of help? PS: I've listened to the audiobooks, but I don't know whether the pronunciation of certain namesis "official" or not