This is a great idea, I'd love to see something like this implemented. I too have not long acquired Lord Scourge and think his default look is great, I've actually been putting off gearing him up because I don't want to ruin how he looks, which is a shame to be honest.
Another thing along these lines which should be looked at IMO is the use of alignment specific mods on companions. For example Lord Scourge comes with a red lightsaber, which suits his look and character very well. Yet I am aligned to the light side and am also an Artifice so was looking to make him some upgrades to his lightsaber, but was unable to add a better red colour crystal to him because my alignment invalidated the use of the mod. I just can't see blue or green looking right with him, especially seeing as the companion alignments are all neutral there shouldn't be restrictions on what they can use.