Well, I dont know how reasonably priced these 
guys are, but they're supposedly the best place 
to send cels too.  They've been restoring Disney 
AND Asian animation cels for about a decade now.  
Im sending some cels in to get unstuck from their 
sketches...at some point...  ^_^;

http://www.srlabs.com

Write and ask them what they may charge for your 
needs.  They're super nice, and get back to you 
fairly quickly. :)