The ones bob has are knockoffs, and a guy would think no big deal right? Well, for Wicos, these just barely work. They dont fit in the grove very well, and the leafs are sometimes so far out of adjustment the contact points dont even touch.
Pass on those ones, its the real Wico ones you want, in which case you may be looking for a very long time. Oh, but for used ones, theres plenty out there, NOS is a different story.