As I've said before I would rather drive a 280S in mint or close to mint condition than a high spec car that is in average to poor condition.
I couldn't agree with you more, and I do have the pleasure of a near-mint 280S!
On the topic of standard size steering wheels, I saw some pics on the net of a "6.9" where the owner had fitted a white wheel from a W108/109. Very smart it looked too.
Last year I wanted to fit a Nardi to Lady Genevieve until I discovered the hub I'd bought was for the later steering column and the Nardi is 2" smaller in diameter thus obscuring part of the instrument panel.
The wood and leather look is very beautiful though.