Mr K reported that on the return trip last year Emirates were giving empty business class seats to the Comrades runners - not sure if it was the whole package, but the extra leg room would certainly be welcome.
That 16 miler I did over a week ago now was a full kit test, I even practiced putting sun tan lotion on the far reaches of my back where my fingers won't stretch to with the handle end of my toothbrush. The vest still has rust marks on the front where last year's number was pinned. I took the number off pretty smartish after getting back to the Hilton that night to preserve and dry it and was surprised that the pins had rusted like that just over the course of the day. I was soaked in water for the majority of it though - you are right PG3, that dress would be a killer at Comrades!