Thanks Mr Swan. I'm a sharing person
Just to clarify, I'm not suggesting the use of these, I just posted for interest and to say what I've seen ie: they have been done very well. They're still expensive but really, like K0 seats, some of the genuine stuff up for sale is just passable and most is not up to a high standard needed for a good restoration. I understand (not confirmed) these are genuine later switches with the chromed section replaced.
Like any good repop, they're generally not cheap. A good example is the Yamiya red sponge seat