did you guys figure this out? I wasn't very specific before and the "example" link was just a picture of what you were looking for. It wasn't in icon format. You can download icons that should paste in properly from the other link I provided.
The interface lift looks to be really dated and probably won't have the unibody icons. You could try iconfactory though. It looks to be more recently updated but you have to find an icon you like after downloading the set. Or you can make your own icon from that example picture. Here's another tutorial for "how to make an icon in OS X"
But the easiest way (which also means you have to pay) is to use Candybar.