I have a player with a similar outter casing as yours.
There are three variations of the firmware for it. I have uploaded them here:
http://www.mympxplayer.org/firmware-...reen-df47.html
http://www.mympxplayer.org/firmware-...reen-df19.html
http://www.mympxplayer.org/firmware-...reen-df56.html
You can try them, but once again, there is no gaurantee that it will work or is compatible with your player. You might make it worst! So please use them as a last resort.