Hadn't heard that either have birds from southwest. I see Thieving Otter is in tn. and they did say in their info that at least their Jumbo Browns were JMF line from another farm. Kansas City Quail did also sell JMF Jumbo lines they are in Mo. I have their birds also. AJ Farms also sold JMF...
Where are you located there are some good sources around, but I would get them as local as possible. Would be easier to help when you have location on your profile.