If you are limited to what you can use due to a products ingredients you have to stock up on products you are comfortable using. We never know when a manufacture is going to change a formulation and a reserve of products compatible to your skin type is imperative. Fortunately a couple of extra pucks, or a couple of extra tubs will provide you with plenty of time to find alternatives when companies change ingredients.
^Pretty much this. I'd get a kg brick or two of vitos, and a few more pucks of any hard soaps you like which work with your skin. When you use up an entire puck or brick, order a new one, and put it in the back of wherever you store your extra kit. Use the oldest things first, keep going on like that.