XT1700 Fastboot oem unlock fails

[k-ninja]

I seem to have lost the ability to unlock the bootloader of my XT1700. I previously had unlocked the bootloader and installed TWRP and SuperSU, which took a while to figure out, but it worked. Today I tried to install a newer version of the stock firmware using SP flash tool (from here), which seemed to work fine, except now I find I am unable to reinstalled TWRP or SuperSU because I cannot unlock the boot loader.

When the phone boots, I still see the "device unlocked" message, and I have enabled oem unlocking and USB debugging in the developer options menu, however when I go into fastboot mode, if I run the "fastboot oem unlock" command, when the phone prompts me to press up or down, I get an "unlocking failed" error, and Fastboot reports "Unlock operation is not allowed"

Any ideas on how I can unlock this device again?

 

[k-ninja]

So it seems like those firmware images must have locked boot loaders. I ended up installing an xt1706 firmware instead (from here) and was able to unlock the boot loader successfully.

Anyone know where to get xt1700 stock firmwares with unlocked boot loader?