Are these available repopped? I think the balls are, but what about the back plastic housing it goes into? Or are these unobtainium?
Best bet is to find nice used. Ask folks that are parting out 67's. I think they are the same for all BOP 67 A bodys. Will these work? https://www.jegs.com/p/Golden-Star/Golden-Star-Air-Vents-Ducts/7965744/10002/-1