Mulsanne's Corner had both practice/qualifying and the race up to 2003.
Le Mans History has them for individual cars if you look up entries for a particular year, but it's hit and miss:
http://www.lemans-history.com/index2.php
I know that the WEC has them from 2011 onwards, but I don't know of anything other than maybe the Le Mans Annual books that would have that info. I don't even think that the ACO's site or even lemans.org has anything like that on there.