I know it's still a while, but I'd try contacting again in summer. That's when I had the most luck, since production was usually going and they'd had a chance to see how everyone had handled winter and started hatching. Fall is usually when culls are sold to make room for new grow outs over winter
Plus there's the risk of disease. Risk with chicks too, which I learned the hard way, but to me, it still feels like more of a risk with birds that have actually had access to a prior flock that chicks that shouldn't have been with the owners flock yet