Many peafowl breeders are happy to answer questions. I don't know much about this kind of variety and definitely never see them listed for sale or on other peafowl websites.
I will contact him today and see if he'll chat, It may be that the birds came from him also I'll have to ask. I know this guy does deal with a lot of the bigger name breeders. If anyone else has info feel fre to post. Thanks