Thes usually come as one a piece. I put them together with imageready. It's kinda time consuming if you don't use anything like imageready.
They do have a userbar maker too, and there are alternate ways of making your own unique sequences of userbars, but I'd recommend using imageready, finding a crack, or finding a free program that makes gifs
I saw your amazing signature that you made for count-sven in his signature request thread. If count-sven doesn't want that signature, just change the text to Whiteclone and I'll find a way to use it somehow. Thanks