That would the from the 2nd to the last special 
that was recently made in the past few years.  
You can find cels from Touch...Are Kara Kimi 
wa...at Anime Shop Commit for half price right 
now.  Usually, the cheap ones on YJ would be from 
that movie, and usually of the male characters.

TV and the first 3 movies would be harder to 
get.  You dont see much, and have only seen a few 
in the past 12 months on YJ.