Hey Matt -- there are tons of cels 
for sale at Anime Chaose (www.animechaos.com), 
and I believe that Nichibei anime just uploaded
cels at their latest update 
(www.nichibeianime.com). If you go to 
www.cels.org at the side menu, you should find 
a lot of dealer's addresses, where you can 
check for yourself. Ah, one of the joys of 
collecting, looking and finding things you
want. :) 
Also there are cels from the series up on ebay. 
I'm sure you'll be able to find something you 
like. Good luck!