Side Stand Rubber

I have seen in my parts book that there should be a rubber peg ‘thingy’ bolted to the bottom of the side stand. All i’ve got is a sheared off screw!.
What is the rubber for? I’ve had plenty of bikes, but never seen this before.

I believe it’s supposed to be a safety feature that flicks the stand up should you attempt to ride off with it down (it touches the floor before the metal digs in). It has wear indicator marks on it to say when it should be replaced. David Silver stocks them @ £3.95

I have tested the kick-up feature once-twice a season, and I can say, that it works well.

Thanks Guys.
I ordered one from David Silver. I will have to drill out the snapped off fixing bolt and make the fixing part from scratch!