Technic-Server-1.20.1/overrides/resourcepacks/CABIN/assets/cabin/models/item/trade_card.json

 {
  "parent": "item/generated",
  "textures": {
    "layer0": "cabin:item/trade_card_0",
    "layer1": "cabin:item/trade_card_1",
    "layer2": "cabin:item/trade_card_2"
  }
}