I am restoring a 72 Satellite. I know that I can use fenders and quarter panels from 71 and 72 roadrunners and GTX. BUt is there any other cars that have the same sheet metal for fenders and quarters that I can use. Can  i use the fenders ans quarters off of a 71 0r 72 charger. I ask because it is extremely hard to find new fenders and quarter panels for my 72 Satellite.  

Sorry buddy. Only other way to get them is to make or patch them yourself. I own a 72 road runner and i am patching all the metal myself. I will let you know how it goes.  

Are there any reproduction body panels available for 71-72 b-bodies?  

I think AMD has just released the rear quarters? Check out Stephens Performance, he's a good distributor for them.