DX(G) Does anyone have a Kindle dxg firmware 2.5.8 restore file to downgrade from 3.2.1?

I updated my Kindle time ago and all the backups were gone... I need to restore my kindle firmware in order install some hacks that are not working ok on 3.3

If anyone can upload or send me in any way the update_restore_os.bin file of the kindle DX Graphite model will be really appreciated.

Thanks!