Here is a closeup of the sockets on my bench. Six duplex-types, installed on American surface-mount boxes.
https://i20.photobucket.com/albums/b210/stephanienyc/MVC-001F.jpg?t=1173491173

They're made in Korea and come in two parts that are sold separately: the socket itself, and the plate kit (which consists of a bracket that screws onto the socket and then the finishing bezel that snaps onto that).

I bought six of these when I was visiting a friend there two years ago...and later I asked her to buy me 10 more.

This is what a socket looks like when you buy it at the store:
https://i20.photobucket.com/albums/b210/stephanienyc/MVC-004F.jpg

First you wire and install the socket in the box (6-32 screws not included). Then you screw on the plastic ring in the middle. Then you snap on the plate, which is on the left. Little tabs in the back of the plate hook into those six rectangular holes along the sides of the ring.

If one of the mods can put the pix on ECN's server, that would probably make things easier. And yes, yes. The installation method does look a little sketchy. [Linked Image]