Some of the old mods work... others dont. Someone was supposed to test composite to mando mod and let me know if it works, but i guess they havent got around to it yet.
Well i can get all the armor pieces minus the helmet to look like mando lol i remember running into a similar situation modding swglive, seems to be a race issue though trandoshans and sullustians wont get the helmet to work, while with humans it will work.