Good luck. ^_^

I've seen a Red Mantle in *someone's* gallery 
somewhere (can't remember where), so yes, there 
are Red Mantle cels out there. ^_^ YJ would be a 
good place to look; there's always that Haruto-on-
a-cross cel whenever I check it, but I'm sure 
others crop up on occasion. AnimeChaos has a 
bunch of HJ cels-- but no RM ones-- so you might 
want to keep an eye on them, too.

Good luck,
-Cres