You can get thicker crust a fioris but it is not Sicilian. All the chicago pizza I have ever had was kinda lousy. There was a place in Mt lebo that did chicago deep dish, st clair hospital bought there spot when they built the new out patient center. I don't know if they shut down or moved locations. I personally would take a Vinnie pie over a deep dish any day.
Lelulo's in Plum Boro definitely has Chicago deep dish! I haven't had it yet, but their regular pizza is great. From what I've seen and heard, it ain't cheap, you have to order and pay for it a day or two in advance, and I think the pickup days are maybe just Friday and Saturday. Hope this helps!