The trial version can be downloaded here:

Download Partition Magic 8.0 Free Trial - Partition Magic allows you to create, resize and merge partitions. - Soft32.com

However, note that it doesn't actually perform any actions - It simply shows you what Partition Magic looks like and what options you have - You can't actually partition any drives or alter volume sizes.

As downloading Partition Magic 8.0 without purchasing a license would be against the law, I'm afraid you won't get any suggestions on where to get it from here.