xino_electro , there are a few pages of v3.5.35 and v3.5.37 firmwares, have you tried all of them?
Also, you might want to try the list here
http://www.s1mp3.org/en/downloads_fw.php
If those on the downloads section do not work, then there is nothing much you can do. As now these players no longer are manufactured in v3.5.3x series.