There is ONE Microsoft Store in Illinois and it is in the same shopping center as one of the nine Apple Stores in Illinois.
I don’t have any inside information, but I would be shocked if you can’t buy this at Best Buy or any of the other large electronics chains. It’s not going to be limited to Microsoft stores only any more than iPads are.
That said, the Microsoft stores are great, so if you do have one near you definitely check it out.