I have wall lights which came with brackets designed to be screwed from the side. However I want to fit these recessed into the plaster, so that the front plate is flush with the surface of the wall (i.e. NOT like this: https://secure.img2-ag.wfcdn.com/im...2887/28878255/Swing+Arm+1+Light+Wall+Lamp.jpg). I think I need a solution where the lamp slides in at an angle and is then locked by rotating into place. I can visualise what the required wall fixings would look like (quite simple really) but have no idea what to search for online. Is anything like this available?