Did you try searching the forums and the mobihand store? I bet you didn't. Give that a try and you'll probably find one.
If you're willing to spend three or four bucks there are some very nice premium iPhone themes, like BePhone and iPlus4. Check out JC Designs at ThemesInMotion.com as well, because I believe he did a couple of them.
Posted from my CrackBerry at wapforums.crackberry.com