A. Lesa,
I think I have one source for you but they do not appear to have a website. I think it would be worth your time to give them a phone call...
Appleton Map Co. or Do North
1004 Olde Oneida St
Appleton, WI 54915
(920) 830-1516
Thier Email: Appleton Map Co Email
Another source might be Clarkson Map Service
I hope this helps.