Seriously I would recommend hitting on the "Frame Builders Sources" and buy a set of rear dropouts that are close in shape and appearance to the current ones. They give frame and the parts to a frame builder in your area and ask him to do the deed. If you only only replace one dropout, there is a good chance that it might be a little bit off from the other one. Better to just do it right from the start. And it really isn't a huge repair if done by someone with experience in the art.