kpw6 5.17.1.0.4 Lost OTA binaries

Recently I've tried disabling ota updates.
The whole process was successful through renaming ota binary files

#!/bin/sh
mntroot rw
rm /mnt/us/update*.bin
cd /usr/bin
mv otaupd otaupd.bck
mv otav3 otav3.bck

echo "#!/bin/sh" > /usr/bin/otav3
echo "/bin/true" >> /usr/bin/otav3
echo "#!/bin/sh" > /usr/bin/otaupd
echo "/bin/true" >> /usr/bin/otaupd
chmod 755 /usr/bin/otav3 /usr/bin/otaupd

mntroot ro
reboot

Run the above code I don't know what went wrong
Unfortunately, I have no other access to these two essential files that I have only one kindle.
Can somebody send me the original ota binaries?I would appreciate it very much if you can help me.

OTA files:
otav3 at /usr/bin/otav3
otaupd at /usr/bin/otaupd

kpw6 5.17.1.0.4 thanks!!!