Cheetah Mounts APDAM3B Dual-Arm Articulating Wall Mount for $39.99 shipped.  Here is a screenshot for your reference. This wall mount accommodates flat panel TVs with 32" to 55" screen sizes, and features 14" extension, 160° rotation, 115-lb. weight capacity, and built-in bubble level.  Most places have this TV wall mount kit for about $77.