Amazon.com: HumanCentric VESA Mount Adapter for iMac 24 Inch (Aluminum), iMac 27 Inch (2009, 2010, 2011), LED Cinema Display, Thunderbolt Displays, Replaces Apple iMac VESA Adapter MD179ZM/A, iMac VESA Kit : Electronics
Apple iMac 24" 2.8GHz - 24" 2.8GHz | Sweetwater
Apple iMac 24-inch July 2009 2.93GHz Intel Core 2 Duo (MB419LL/A) – UNICOM, Inc.