Prompt 4.4.2

Trying to figure out how to get 4.4.2 on my motox XT1053 tmo. I rooted it and installed a custom rom before the update, and I'm not sure how to get to 4.4.2, all the custom roms seem to require 4.4.2 before installing them. Much of the documentation seems to be outdated or missing, I've been looking for days or I wouldn't ask.

How do I get a 4.4.2 custom rom installed if I only have 4.4 installed currently?