if you have your serial number, you can download a trial here: http://prodesigntools.com/direct-download-links-for-lightroom-3-and-ph otoshop-elements-8.html
you must follow all 7 steps. if you have a dl problem, re-read the 7 steps and follow them.
if you don't have a serial number, contact adobe support to see if they can supply your serial number: http://www.adobe.com/support/chat/ivrchat.html
because that product is old and no longer supported, they may not be able to help.