Gene,
I have the green Yorkshire too. I was told this white one just came to light recently. I got mine from Barry S. in Newport. He said there very few of them and the hot stamps are pretty weak. He was in Larry's shop yesterday and Larry and I took the best ones he had. I don't know what else is out there.

Also, if you ever have a chance to get a picture of the Arrowhead Item, I'd like to include it in with the stuff I have been putting together.