Just seeing this now, hopefully this diagram and part number can be of some help. I can't post pics because I'm not a member but pictures are linked below. Switch is located under pedal system. I'm surprised they couldn't find it for you.
Not sure which part number applies, I'm sure when they enter your chassis into the system, it will narrow down the number.
I can't find it on any diagram. I'll have another look tomorrow but I'd say it's the full unit. Could get second hand.
EDIT: Did a bit of research and it is a bit of a troublesome thing. It?s definitely the full assembly but one guy on a forum said he jiggled the switch around and another said he filed a piece down so it?s anyone?s guess.