You might also want to try:
http://www.whitneyportalstore.com

and

http://www.summitpost.org/phpBB3/california.html

I dropped my camera coming off Whitney one November evening a few years ago before coming down Trail Crest. Only one guy had made the summit before me and fellow hiker I met on the way. Only two other guys were coming up as the sun was dropping. I thought I was never going to see that thing again. They actually found it and sent it back to me. Good luck.