Amazon.com: Mount Plus 201F Adapter Bracket Convert VESA 200x200mm to VESA 400x400mm and 300x300mm (Fits Most 32" to 55" Flat Panel TV) : Electronics
PERLEGEAR FULL MOTION TV WALL MOUNT for MOST 26–50" TVs MAX VESA 300 x 300mm | eBay
Amazon.com: Mount-It! VESA Mount Adapter Kit | TV Wall Mount Bracket Adapter Converts 200x200 mm Patterns to 300x300 and 400x400 mm | Fits Most 32 Inch to 55 Inch TVs | Hardware Included : Electronics
Amazon.com: VideoSecu LCD LED Plasma TV Wall Mount for VESA 200x200 300x300 400x200 400x400 300x200 400x300 600X600 MF660B : Electronics