This site has so nice Sailor Moon cels
http://www.rosearts.com/rose/
and so dose www.anime-cel.com

in fact i was planning on selling my SM cels and 
half of them are from the Stars season.E-mail me 
if you are intrested.

-Lauren

P.S
i think the cels from SM are thinning out becuase 
there are a lot of rare charecters in the Stars 
season and the animation art is much nicer in 
that season.