The hatchery I found here in Ontario breeds them (they deal with 'rare & unusual' breeds).Someone on BYC just got a breeding pair from a breeder and posts about it. If I can find the thread I will post the link.
Found it. Maybe you could ask Ted which breeder he got them from.
https://www.backyardchickens.com/th...-1-pullet-from-each-of-4-blood-lines.1556966/
I wanted Cream Legbars but they have them listed as 'unavailable' now. Not sure why.... maybe they will relist them by the time I get home.
What I really wanted from them was the Sultans - but they only sell them as 'straight run'. I can't take the risk of getting Roos with the chicks. My luck I would be like @RebeccaBoyd and get all Roos


UPDATE: Oh Darn It! They only sell them as straight run - well darn it!
This is getting very complicated - Hmmmmm.
Here is the price list for Performance Poultry what they have available.