If you are using fat-free protein sources such as isolated protein powders, then you should be adding two blocks of fat to achieve the same ratio. Obviously if you are eating higher-fat protein choices, you would not be adding any extra fat blocks to your meal. Remember, every time you add additional fat blocks to a meal they should be composed primarily of monounsaturated fat. Excellent sources of isolated protein include egg and milk combinations and whey. For vegetarians, isolated soy products are excellent choices.
Protein powders are available at most health food stores.
Vitamins and minerals are an excellent low cost insurance policy to ensure adequate levels of micronutrients. A Zone diet, when primarily composed of low-fat protein, fruits and vegetables, provides an excellent base of vitamins and minerals and requires much less supplementation. Use them as condiments, not the primary source of your carbohydrate intake. I'm supplementing my diet with flax seed oil. Therefore, supplementation with EPA, as opposed to ALA, has a far greater benefit in getting you to the Zone.