In all my years...
I still am convinced that the /5 camshaft (including the point cam shaft--AKA "the camshaft tip") has to be machined in one piece. This is the simply most reasonable manufacturing process since the D-shaped end determines the ignition timing.
I'm not saying your observation is wrong. It's been years since I've looked closely at at camshaft and I don't have one I can look at here, so I may have had the misimpression all these years.
Anton?? BMWrench? et al
At any rate, unless we can thing of some way to re-index that points cam tip in the engine, you'll need to replace the camshaft... :(