Middleton Farmers Co-Op: Cenex Convenience Store is a Gas station that either offers propane refill, propane exchange, or propane delivery services. You can find this business location at 7515 University Ave in the city of Middleton. For more information about hours of operation, directions to this location, and phone number, please scroll down for more details. Can’t find what you’re looking for? Find other places that offer propane services in Middleton or Wisconsin, by searching our near me search function in the search bar.