Conscientious Objector - Team Fortress 2 Item for Minecraft
The file issue has been resolved, and you can now install this rather unusual mod.
Due to MCreator limitations, the Conscientious Objector image appears the same for all players on the server. Full functionality requires the additional Transmog mod, which allows replacing the appearance of any items. The image will stretch if the item is not cube-shaped, but supports transparency, so you don't need to fill the entire background.
Special thanks to the creators of the original item and Valve for adding it to the game.
The mod can be freely used in modpacks, attribution is not required but appreciated.