At the San Diego Comic-Con Sideshow Collectibles showed of its upcoming projects and news that they acquired the license to create products from Transformers: Revenge of the Fallen. As part of that they are creating a highly detailed 20'' Optimus Prime maquette based off the CGI model created for the movie. A video showing some of their early work on the project can be found here. No release date or pricing released.
Sideshow popped up on my radar years ago with their fantastic Lord of the Rings products. They have since then expanded to a wide range of stuff that is amazing to look at but expensive to buy as they are geared to the high end collector. It wouldn't surprise me if this one lands in the $300 plus price range. Thanks to Luis for the link.