I don't think he answers on weekends but keep trying through the week. He is a busy man but will do everything in his power to take care of you. We have bought quite a few eggs from JMF and he has awesome stock. As far as availability, you will have to talk to him. I know he has been sold out of a lot of varieties, but I would call asap and shoot for the date you want rather than wait a week before to call. Also he uses PayPal, and he can send you a link via Email and you just fill it out and you are good to go. Hope this helps. Once you get your hands on his eggs and raise some up, you shouldn't be disappointed.
Ryan