I presume, you haven't backup of original Kindle files and kernel.
I believe, upload this backup to your Kindle should make update successful.
So you can download original backups here:
http://pastebin.com/Wdw4L7yT
- this link is also in "debricking" sticky
You can easily flash kernel with fastboot, and main over ssh with dd command, look here:
https://www.mobileread.com/forums/sho...d.php?t=180789