It's not possible to buy the application or a CD with the application because the official website is discontinued. When you access it, a DNS error is displayed instead which means that the domain might exist, but the hosting is discontinued. There is no way to buy the application officially. It might be possible for the website to return, but only the developers know that.
If you want data comparing applications, try IBM SPSS which is a great tool to work with the data, charts, comparison tools, etc.
IBM SPSS: http://www.ibm.com/analytics/us/en/technology/spss/