I've spoken to Keevin. Seems like a really nice guy. His dad was a poultry superstar. Keevin told me the story of how the original silver spangled spitz were brought to America by a German POW who decided to settle in Alabama after he was held there as a prisoner during World War II. He simply brought them over on a commercial plane with him when he traveled shortly after the war ended. I take it that U.S Customs wasn't quite as vigilant back in the day.
I was under the impression that the golds had been imported at some point in recent years --maybe informally imported-- from, in the words of the person who described it to me, "across the pond." So, if that rumor is true, I'm not exactly sure of the timing or country of origin. Probably in the last five years, definitely from Europe. That's all of the story that I have.