A great collection of firmware and manuals for more than 20 players.
Scroll through the Products page and find your player and note the model number then go to the Tech Support and download the firmware for that model.
Products:
http://www.le-mon.com/prod_mp4.php?pageID=1
Tech Support:
http://www.le-mon.com/support_mp3.htm
Hope this helps bring back a few dead players.