I. Want. One. (or four). Of. These. PINS. Oh my GOODNESS.
I actually have one of these that I am getting ready to relist in my shop in a week or so. It matches the largest one in your photo and the advertsement which describes the quality engraving available yet I described the one I found as "crudley" engraved thinking someone had done it themselves...Best of luck with that retail shop! What an endeavor!