Anyways, you can get this sig from northen light. (She has a shop in the Shop section)
But, she alredy has a list of them, i don't remember exactly where they are, but it's in the art section, it can be found here http://www.serebiiforums.com/showthread.php?t=441565
You can take any of those, as long as you give credit to her. If the badge you want isn't in that tread, you can order it in her shop.
Remember, follow the rules, if you don't, you'll get auto banned (like 3 days or something), so, read the rules.