I have just received an email from John Coppinger who played Graxol Kelvyyn in Star Wars Episode I: The Phantom Menace 
and Wookiee Senator Yarua in the same movie. 
 He was also the sculptor of Jabba the Hutt in Star Wars Episode VI: Return of the Jedi
 he has been to Kent and retrieved the original Jabba mould and he is going to make a plaster cast of it for me to use and show Alex 
 i will update you all with photos of the event at a later date