Its likely that it will be very hard to get original manufacturer's parts.

However, its usually not too hard to hand make the parts from balsa, spruce, aircraft ply or other materials from the hobby shop. (Hobby Lobby craft/home decorating stores carries most of the woods you'd need Lowes and Home Depot also have some materials. )

If you need help figuring what you need, and how to go about making it... (or size of a tailsurface...) e-mail me with some pics of the plane. We'll get it figured out.