Hello, I've got a 2006 A6 4.2 Avant now on 150k miles, so getting a bit "leggy" but still going well!

The drivers seat has developed a really annoying creak from the backrest, but it's also starting to feel a bit tired - unsurprisingly the passenger seat feels much fresher. These are the full leather seats with electric everything.

Clearly a straight swap is out of the question, but has anyone tried removing both front seats and dismantling them to swap the covers, foam and spring bases over to make the drivers seat better?

Thanks