Emperor Dom Pedro approves.
The item id for Old Emperor Shirt in unturned is 8006. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Clothing
Size_X: 3
Size_Y: 2
Size_Z: 0.6
Width: 3
Height: 5
Armor: 0.95
Blueprints: 2
Blueprint_0_Type: Apparel
Blueprint_0_Supply_0_ID: 8006
Blueprint_0_Product: 66
Blueprint_0_Products: 3
Blueprint_0_Build: 32
Blueprint_1_Type: Repair
Blueprint_1_Supplies: 1
Blueprint_1_Supply_0_ID: 66
Blueprint_1_Supply_0_Amount: 3
Blueprint_1_Build: 32