I found a temporary fix by using Netcaster's class .txt as the base for the others. They appear in my barracks with everything correct except for their name.
You have to use the gacha to get the modded units as right now there isn't a system in place to have the autopopulate the barracks like normal units. Partly due to the issue of a mod potentially not being installed and you don't want to tell the game to try and create that unit.
