Not sure the firmware files are still on the download page due to the new security features in 4.36.10.2700 and beyond.
But, the versions you need are still available.
The version just prior to 4.36.9.139 is 4.36.9.131
Check this post for the ability to download V3 firmware:
Here are the instructions on flashing firmware. Make sure to use a 32GB SD card: