Lain cels are pretty rare, and I've only seen one 
with a background once -- and lain was so small 
that you could hardly make her out! The 
backgrounds used in this series were largely 
computer generated, so the odds of ever finding 
even a b/c grade lain with one will be difficult. 
Good luck with your hunt, and I hope you find 
what you are looking for.

- Karen