Which CAM can work with premium Sky channels ?

[Blizzarduk]

I have a FireDTV box (among other satellite receivers) and I used to use a Dragon T-Rex with it and would enter my box key to get the premium channels on Sky that I subscribe to. Sadly when the white cards came along it stopped working. So I purchased a new Diablo and it worked except for the fact there was no where to type in a box key, so all I could decrypt were the non-premium channels.

Does anyone know of a CAM that I can insert in to my FireDTV PC box that allows UK Sky premium channels to work with my legit subscription ? If not with the FireDTV then I don't mind purchasing a TBS 5980 USB DVB S2 TV QBox CI

This card here seems to do box key and supports NDS, but it is very costly to experiment with : http://www.unicam2.to/olduni.php

Thanks !!