I don't think you can download this version anymore. I've searched on the official website and it appears that there are only update changes posted. However, you have the possibility of downloading the trial version of the software through the link posted below, only that it's an updated version that reflects the current changes.
Download page: https://www.telerik.com/download-trial-file/v2/reporting
Additionally, get in touch with the developers through the following link in order to obtain more details regarding a previous version: http://www.telerik.com/contact