Product review (5 stars): As described, too bad they aren't sold individually!
All I needed was the tiny little thumb tack looking piece but everywhere I looked only had this as a set with all three pieces.  The old part just wore out and the tack thing would not stay in.  The new point on the new piece has a large tip that looks like a circular arrowhead  whereas the old one I had barely had much of a tip.  All pieces came in a sealed bag so I doubt the manufacturer even produces these individually.  Such a shame to have to pay $15-20 for a part with three items even though the piece I need feels like it should cost $0.25.  The new part works great and I didn't need any tools to disassemble or install, just snapped it into place.