Thanks for all the input and ideas.
Since there seesm to be no clear standard for a 2002 rear fog switch, I've decided to use separate switches the front and rear fogs. Living in Boulder, we often have heavy fog coming off the foothills of the Rockies and fog lights are very helpful. However, in my experience, I use the rear fog light only in the heaviest fog to be seen from behind. I use the front fogs more often, e.g. in rain.
My DD (VW R32 MkV) has front and rear fogs with separate pull out positions on the (Euro) switch for front and rear.
I'm planning on using two lighted switches (amber front, red rear) replacing the dummy green button in my '72 2002tii.
I'll post a pic when done.