The fig man in New Mexico is not easy to catch up with, he did give talks about figs a farmers markets. He is selling out now though and yes he make claims that his figs are super cold hardy, even colder than celeste as he has said. He gave some home made name to some of the figs as in the place name where he acquired them from. I purchased cuttings from him that was dried out, He replaced them with some what fresher cuttings but that also died. He was always hard to catch up with.
As for Dalton I think his father has been very ill for some time now, and he's been spending most of his time taking care of his dad. Dalton is a great person to deal with. I met him in person a few times and he usually just takes phone call as Dennis has said. I can say of all the fig trees I purchased from him they have been really great fig trees, the one he recommended for my area grew just as he said, and they were super healthy fig trees when I received them also.