Does anyone know where I can find production art from "The Thief and The Cobbler" that's still for sale?

[Alex]

I would really like to buy some animation cels or original sketches from this movie, particularly anything that has the character Tack in it. Every time I've found some they were already sold a long time ago. Does anyone know where I can find some original art from this movie still for sale? Please help! lol