The Winn Dixie on Apopka Vineland Road was still open as of this weekend. I'm pretty sure that is the one most are referring to. It is about a mile North of Goodings on the right just after an ABC store. There was another Goodings and I believe another Winn Dixie further North and both of those did close a few years back. They were at Sand Lake Road and Apopka Vineland.
192 is an East-West road at the the South end of WDW property, Simba's Mom. Years ago, that was the road we all used to enter WDW property. But from OKW, I think Winn Dixie is closer. However, I've never tried the Publix that Debbie referred to. I did go to the Publix off of 192 this weekend though. Nice bright store and far superior to the Albertson's at Orange Blossom at least in terms of ambience. That Albertson's was depressing!