Your best bet is probably to find a really nice blank button, then use Photoshop or its ilk to add what you want on top. You can check many of the free font places, like dafont.com, for their winding fonts which sometimes have decent arrows and such. In my experience it's tough to find exactly what you're looking for sometimes, but if you can throw a few different pieces together you'll get what you want, plus the satisfaction of doing some of it yourself. If that sort of thing appeals to you.