http://sephora.com/browse/product.jhtml?id=P296010&categoryId=B70 Nails Inc
http://shop.laylacosmetics.it/index.php?page=shop.product_details&flypage=davide.tpl&product_id=3903&category_id=93&option=com_virtuemart&Itemid=1&lang=en Layla Cosmetics
Amazon also carries both =D.
P.S., Nails Inc has a magnet that is attached to an extra top cap that you can remove, while Layla Magneffect has the magnet is attached to the actual cap. Each magnet produces different designs. The Nails Inc design has a wavy looking design, and the Magneffect has a more linear design. I love them both! And, you can mix/match the magnets with the polish.