Lots of 47's out there and they're still able to scrounge parts ...
http://www.bell47helicopterassociation.org/
At that price somebody's going to start building blades. It seems that's what happened when Textron jacked up the price of the tail rotor components a few years ago. It's a much loved machine and I don't think it's going away for awhile, even though it seems the manufacturer would prefer that it did.