there are a small handful of Miyuki cels at at 
Anime World Star:

http://www.anime-world-star.com/08cel/008.htm

I just bought one! *^_^*  I got the one of 
Miyuki surprised!  What a Kawaii cel!! >_<  But, 
they have one of the Door girl too, not just 
Miyuki. It's really beautiful! Check it out! 
Hope that helped! *^_^* Take Care!

Laura ^-^