I had never heard of this before so I went ahead and looked it up after reading your question and indeed there are African Violet leaves for sale. My answer is go to your local indoor plant nursery and buy a plant. I work for a high end greenhouse nursery and we sell African Violets for $5 to $6 each, we also have a wide selection of color varieties, I doubt that indoor plant retailers in other places are much different. The web site I looked up had 2 leaves for $14.95, that seems extreme for something that may or may not even turn into a viable plant in the end. I did not even consider until now that they would probably charge shipping as well. It does not seem worth it, just go buy a plant.