BILL PEACH INTRO FOR SOME TIME, THE EMACIATED ENGLISH MODEL TWIGGY HAS BEEN THE DARLING OF THE FASHION SCENE, BUT TODAY AN EVEN MORE UNUSUAL AND MORE TALKED-ABOUT MODEL ARRIVED IN SYDNEY. SHE'S DONYALE LUNA. SHE'S OVER SIX FEET TALL, WITH THE LONGEST LEGS IN THE MODEL GAME,