As it sits right now, if you at some point upgraded to ANY of the leaks that changed your baseband or kernel versions, you're screwed as of right now.
But, the moto is aware of the issue and hopefully they'll come up with a work around. I'd guess the workaround would come in the form of a FULL update versus a PATCH update
Simply reapply the 5.5.893 "leak" from the stock recovery the same way you did the first time, and you will have exactly the same thing as what others who got it over the air. As you know (if you already applied it once), make sure your are back to stock in terms of the software, and the update should take again. Even if you cannot get it OTA from moto right now or the "check for updates" fails to provide anything, applying the leaked update shoudl be EXACTLY the same. The file sizes are the same, the version number is the same = that all equates to it being exactly the same thing.
FYI; the official OTA WILL NOT WORK IF YOU DOWNLOADED A LEAKED OTA BEFORE.
I downloaded the leaked .893 before rolling back. I just got notified of the OTA on my phone, but it failed to download. So if anyone knows of a workaround, I'd appreciate it.