hey nikki,
here are a few dealers... hope this helps ^^

VanEaton Galleries
http://vegalleries.com

Choice Collectibles
http://allanimation.com

Animation Art Galleries
http://www.animationartgallery.com

I haven't dealt with the second 2 but VanEaton is 
a very good dealer. Good luck finding what ur 
looking for! :D

~Yaten