The boys at Bentleigh Garage painted the steering wheel for me.
They matched the turquoise to the original plastic at the top and bottom sections, and I had them paint the side sections black. The results look pretty sharp!
With regards to the steering wheel orientation, I have a brochure shot and an image from the 1959 accessory brochure (below) which show the small area is at the top.
Should it be the small or large area at the top??
The repaired six way seat control switches now work absolutely perfectly. The car is not a whole lot quieter after adding the extra under carpet heat and sound insulation, but it is still noticeable.