The problem with things on collectors source (and likely the reason the link doesn't work now) is that much of their stuff is one-off, and not held in quantity. So the one dummy sten bolt may have now sold, and very possibly because of the posting on this site.
I check their site daily for new listings, and it is often incredible what will show up. You have to be fast though, as the good stuff, if priced properly, does not languish on there long.