You will find that happening with many free plugins over the years (the post you are quoting is 13 years old!) and it doesn't make sense to point out every dead link because of that. Generally I would advice against using such old plugins even if you can find a working download link because if they are not maintained anymore, chances are high that they have issues with newer operating systems, hosts or technologies (such as high-DPI screens or 64-bit processors) that will never be fixed.
Try reading this thread back to front rather than front to back as it will be much more likely that you will find working download links that way.