It's funny you should mention that, because I've 
been collecting/looking at IY cels for a few 
years now and have never once seen one.  It makes 
me suspicious that the OP/EDs of the earlier days 
of the series are CG, although they don't look it 
( in comparison to the new CG episodes ).  I 
would be curious to know if anyone has ever seen 
one.