Sorry that I was thinking you meaning the q/r part.
you can buy the studs on ebay but are about £3 delivered and that set is £6 or offers delivered.
Of course if a bike shop need 15 of them or so, there are bulk buys.
I probably have one spare, but shipping is likely that for a bolt now with Royal Mail.
Sorry fighting to type and edit on mobile with the large stupid fecking rules banner permanently there and the screen is unaware of it for sizing when editing and centring, that and the eBay advert joining it to make it all sorts of editing hell.