downgrade server 2008r2 to server 2008

The Mircrosoft fulfillment website that used to be found at

'http://www.microsoft.com/windowsserver2008/en/us/downgrade-rights.aspx'

now takes you to

'http://www.microsoft.com/en-us/server-cloud/windows-server/support.aspx'

From this website I can't determine how to request the server 2008 sp2 (32bit) downgrade media and licensing key.

Thanks Jeff