I have used these Hood type plates fit on a standard wall box.
basically it's just a hood so no need to terminate to a wall plate.

This could be handy for putting mulitpul cables out of one wall box.if you have moved in and got carpet in, you dont really want to be chasing the wall.

A lot of things are possible have you got a photo of the wall ?

Do you require tv down below tv for anything ? or can you cut it put it into tv and use the rg6 going down to bottom for feed back from below. ?

Foxtel is better on hdmi or component you can get HDMI and Component Over Cat 5 adaptors, if your only option is to run a couple of cat 5 cables up a conduit then convert them to the output you require.