Hello Thomas, Having made several inquiries in the Quad Cities Area and best I can offer is to visit some of the Ethic food stores near you, who carry a variety of vegetables not found in the bigger main stream grocery stores. If size is not an issue, consider a "husk tomato", also called a tomatillo. If you can locate a grower extending the season using a "high tunnel" system, he may still have tomatoes in production and would have green ones.
Sincerely, Richard Hentschel