Hello! I'm glad you're interested in painting by number kits and diamonds for adults. I can recommend several reliable places where you can find such kits. One of them is Figured'Art. They specialize in diamond painting and offer a wide range of kits with high-quality materials and a variety of motifs. You should also pay attention to AliExpress, where you will find many options at affordable prices. Don't forget to check customer reviews to choose quality and reliable kits. I wish you successful shopping and enjoy your creativity!