To find a color-matched replacement in-ground post for the Sector Panel Fencing 1200mm high fence panel, made up of 2 half posts, contact the manufacturer or supplier. Request a post that matches the color and is designed for the 1200mm high fence panel. Provide them with the necessary specifications and dimensions. Inquire if they have a suitable replacement post available. Confirm that the post is compatible with the Sector Panel Fencing system and fits the structure of 2 half posts. Verify the color match and dimensions before finalizing your purchase.