Bricked XT1526 by overwriting CID partition

Title nearly says it all. I have a full set of backups for all the partitions on this phone. I overwrote the CID partition with a backup from a different XT1526.

The result of overwriting the CID with the wrong phone's CID is that it immediately only boots into fastboot. I cannot get into recovery or any other setting except "BARCODES". The bootloader now shows locked as well.
fastboot getvar all returns (extra info deleted):
cid: 0xDEAD
channelid: 0xDEAD
ro.build.fingerprint[0]: motorola/surnia_boost/surnia_cdma:
ro.build.fingerprint[1]: 5.1/LPI23.29-18-S.12/39:user/relea
ro.build.fingerprint[2]: se-keys

I have the CID partition ready to reload, however the bootloader is now locked so I cannot do so.

In the process of trying to get back to a semi-working state I have:
- Attempted to re-unlock the bootloader - but the phone returns "fastboot oem lock currently disabled"
- Issued the command to relock the bootloader (it was already locked from the result of CID corruption)
- attempted to use RSD lite to flash SURNIA_BOOST_5.1_LPI23.29-18-S.2_cid9_subsidy-DEFAULT_CFC.xml - but that fails

Is there anything that I can try?

Thank you,
Nathan

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