Ian, I did the search using the link that DaveT1 provided for Purex and it listed that Osco as the closest to me. I was a little hesitant b/c I wasn't familiar with that area, but DH thought I'd be ok (I grew up very sheltered) and he was playing video games and my little boys were napping. Since I took 55, it took me only 20 minutes to get home. Actually, it took me longer to get there b/c I was stopped by a freight train that was moving so slow, I could walk faster, and after about 10 minutes, it STOPPED! Thank goodness for the navigation system in my car. I turned around and got back on 55 to Cicero and went around it. If you ever go to Midway Airport, this Osco isn't too far away.
I didn't see your post until this morning, otherwise, I would have gone to a Walgreen's that has the Tide b/c I was sort of headed to that area today. Good luck.