If I were you I wouldn't bother to scan this cel 
in at all. You already display more of the image 
on your gallery than they do, and in my personal 
opinion if that didn't convince them nothing 
else will (plus I don't like showing complete 
cel scans anyway). If anything, you have more of 
a right to be suspicious about _their_ ownership 
lol. 

Ignore them, that's what I would do.