In-wall multimedia cable trunking with tidy exit plate?
As the title.
Does such a thing exist rather than leaving a bare hole in the plaster?
In essence I would like substantially-sized trunking (say up to 8cm square section or rectangular but equivalent cross section*) that I can cut to length, fit a 90 degree elbow at each end, recess in a chased-out wall, re-plaster, and then fit a flanged faceplate for reasons purely of tidy finish. The faceplate either needs to be white plastic or suitable for painting.
Suggestions, please?
Normally I would make something, but don't have the time - and the family wants the job finished!
Thanks very much,
TLXV
*Yes, this chunky. Power cables for TV and 6900k backlight are run in their own conduit a couple of feet away from the one I am writing about, but I still have nine signal cables today and who knows what tomorrow. They therefore need to be loose, easily drawn without kinking, and with space for further cables to be added in future.