Does anyone know of a good lock to use on an iPhone? like the ones used in the Apple stores to physically lock the phone/ipods to the table to prevent theft. I have only found the locks by targus. http://www.targus.com/us/productdetail.aspx?sku=ASP06US http://www.kikatek.com/product_info.php?products_id=19130&source=froogle does anyone have experience with these locks or know of better alternatives? Thanks. Are the ones they use in the Apple stores buyable?