Our first bunch was a clutch of 8, plus two from another hen, from Old Gjerpen Farm, in Virginia. You could also contact Colonial Williamsburg's animal husbandry department. They may have more information. The middle pic is of part of the Williamsburg flock.
There is also a new Nankin thread here on BYC, started by a friend of mine in Georgia (who also took the WMsburg pic.) Maybe if we get people interested in the breed here, we can save these amazing little birds. They have quite a history that's not worth losing ... like being the founding breed for most of the bantams sized down from standard chickens.
Oh WOW! My daughter just came running in to tell me that Pepper has FOUR peeps, not three! Doing the Happy Dance at our house!!!!