I just visited the site, and while it looks/sounds very cool, I can't get behind $8+ per dozen eggs. Just...no.
Have you tried calling your local farmer and see if she'd be willing to set aside a dozen or two for you if you were to set up a payment schedule, etc. You never know unless you ask. If this isn't possible, then If I were you, I'd just do the best I can during the winter and eagerly await the spring.