When you say duplicate would you send me one to customize or would you want me to go out and buy one and alter her? I am selling this exact one very soon, after July 1st. Send me a note and we will talk.
Personally, if you are in to sculpting/modeling I would use poly clay. It's available at most craft stores, and it bakes very well. I used poly clay for the horn and wings on the two filly princesses. ^-^