Thanks for the tip on the alternate terminology - 
found a few more that way. 

It seems that hanken mono is a broader term that 
refers to any original copyrighted object, 
including cels and 3d models, whereas hanken cel 
is more specific. 

I would be very interested in seeing the A-Ko 
hanken cels. In fact, I'm interested in seeing 
hanken cels that anyone has whether or not 
they're available.