I think you'll probably be hard pressed to find a real carbon fiber back with the apple logo cut out simply because of the material. Like you, all the real ones I've seen are a solid plate. If you aren't against fake carbon fiber, the Teksure skin from Lucky Labs is a great alternative. It's 3M material so it's easy to apply and it's also reusable if you take care of it properly. Plus it's relatively inexpensive at $9.99. Lucky Labs also sells a real carbon fiber stick-on back called the Truskin, but the apple isn't cut out.
SGP and iCarbons have similar products, as well as all the cheap ones on eBay of course, but I can't vouch for the quality of those.