First, to describe what they are - I've only heard them called "French macaroons" and they're two thin, almond-paste macaroons (NO coconut) sandwiched around a thin layer of buttercream. And they are heavenly. Ideally - to my taste, anyway - they have a strong almond flavor (sometimes the almond flavor isn't as strong).
The Talbot is at 20 E Delaware Place. I know of four places in the Chicago area that sell them. Starting with the closest, and moving away from there:
1. You can special order them from Fox and Obel, our well-known gourmet grocer, roughly 3/4 mile from the Talbot:
Fox & Obel
401 E. Illinois
312-379-0108 (Bakery Direct #)
2. About three miles away:
2229 N Clybourn Ave
Chicago, IL 60614
Vanille's are tiny, but very good. Just eat more. ;)
3. Fourteen miles north:
Evanston, IL 60201
847 328 9434
I'm not that fond of the ones at Bennison's; they don't have that strong almond taste I prefer.
4. 25 miles north:
Gourmet Frog in Highwood is the carry-out adjunct of Froggy's French restaurant.
Gourmet Frog Bakery & Gift Shop
316 Green Bay Rd.
All of the above except Fox and Obel carry them in multiple flavors (flavor, e.g. chocolate, raspberry, etc. added in addition to the almond paste base). IMHO, the ones at all of these places, with the exception of Bennison's, are wonderful.
I have been on a search for good ones for years. Sarah's Candies sells them but they will be nothing like you remember from places like La Duree or Pierre Hermes in Paris. Still, I find it is better than nothing! Sarah's Candies is at 70 E Oak St.
They typically only have 1 flavor. Honestly, there are other places people will recommend, but none worth travelling for. None will taste like Paris so just pick up 1 at Sarah's and it might be just a slight reminder of Paris.
Oh, call in advance since they may not make them every day.