Review on HumanCentric VESA Mount Adapter for Apple Cinema Displays - Compatible with 20 inch and 23 inch Models, Replaces Apple M9649G/A, Patented and Effective by Andrea Taylor

Pros: Works great, does what it's supposed to, supports my old 23" cinema display. Includes the tools needed to remove the Apple stand Cons: At this price I would have "I'd like to see a fancy aluminum profile like the HumanCentric solution for later iMacs and Cinema Displays. A slightly cheaper price would be even better, since it's just a bent piece of sheet metal. Conclusion: really the only option. The Apple version of this part has been discontinued and is sold at auctions for more than the monitor it comes in. This is the only clone I've found and it does the job perfectly.