I adjusted the roughness of the "Iron Helm" since it's so glossy, so you won't have to add Vamifier to fix it yourself anymore.
Also, I added a third helmet, it's mistakenly named "Slavic" in the assetbundle but this is the "Early medieval nasal helmet" (I removed the chain mail around the sides; I may add it as Unity cloth in a later update.)
Credit for the new old helmet:
"Early medieval nasal helmet" (https://skfb.ly/6RnYT) by SebastianSosnowski is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).