Here are the relevant project and download URLs:
Visit the project download page. Select to download ashkelon in whichever compression format you prefer (.zip or .tgz). After the download is complete, unpack the compressed file. You should now have an ashkelon working directory.
We are more than happy to assist you with getting ashkelon properly configured and installed in your environment. Feel free to email Eitan directly at <email@example.com> or the appropriate mailing list.