I'm little further north of you both, just outside of Halstad, MN. and I have Wyandottes too!
But I only have 3 and they aren't for sale at the moment.
They are egg laying machines though! They have laid all winter, every day! I still have the email of the guy I bought them from. He may be selling more. I bought them last Fall and they started laying a couple weeks later and have been laying ever since. They were hatched spring of 2009.
Let me know if you want his info. He is in Fertile, MN.
As an FYI... there is a feed store in Halstad located right next to the bank called Eagletree Feeds that has all the chicken supplies you could ever need. Her feed and oyster shell prices are cheaper than in Fargo!
After reading on this site about Diatamaceous (sp) Earth, I asked if she could handle that too and she will have it available soon! She will also be stocking feeders, waterers, etc.
The store also has horse, dog, cat, and all the other feeds there too. I hate to sound like a commercial, but she has some cute consignment stuff there too. I just really like her store and am hoping she makes it, so I need to spread the word!
Oh, and it is only open part time, so Thurs - Sat. Go check it out!