Parallels Plesk Panel 9.5.4 is now publicly available on parallels.com and through Autoinstaller.
http://download1.sw-soft.com/Plesk/PPP9/rn/en-US/plesk-9.5.4-for-deb-based-os.html
http://download1.sw-soft.com/Plesk/PPP9/rn/en-US/plesk-9.5.4-for-pkg-based-os.html
http://download1.sw-soft.com/Plesk/PPP9/rn/en-US/plesk-9.5.4-for-rpm-based-os.html
http://download1.sw-soft.com/Plesk/PPP9/rn/en-US/plesk-9.5.4-for-windows.htm