There was an old post on Rec.Aviation.Soaring by Wayne Garner, Sr. saying he had the molds, but there were no further replies. Wayne Sr. has since passed and we've located a glider trailer in his son's yard (via Google street view) here in West Palm Beach. (We were just researching this a few weeks ago.) I worked with the Garners long, long ago and they had their fingers in a lot of different projects when I knew them.
His son is an A&P and runs Big Sky Aviation in West Palm Beach. You might be able to reach him that way. Good luck.
Paul