I was looking for something similar, and found one made by Ergotron, called the Glide Wall Mount, PART NUMBER: 61-128-085. It mounts flush to the wall and travels vertically around 18 inches.

This Rocketfish TV Mount Is Actually Worth Your Money . First up, the technical stuff you actually need to know: This beast ...

The Perlesmith tilting TV wall mount bracket ($20, regularly $28) is perfect for low-profile 23- to 55-inch LED, LCD, OLED and plasma flat-screen TVs with VESA mount patterns between 75x75mm to ...

When I had a basic tilt mount for my old 70-inch TV, simply adjusting HDMI plugs in the back could be a two-person job, because we had to lift the TV off the wall in order to reach the ports.

You can find TV wall mounts (and wall mounting accessories) at pretty much every major big-box retailer, including Walmart, Target, Best Buy, and Home Depot.

Fixed mounts: These are generally the simplest and cheapest TV wall mounts. As the name implies, these mounts keep a display in one position without any tilting or swiveling support.

Invision TV Wall Mount EV600, £31.29 - buy from Amazon; Sandstrom STL14 Tilt, £49.99 - buy from Currys; Mounting Dream MD2268, £16.99 - buy from Amazon; ...