Miami Thong Lift Procedure. Is there a surgeon in the Chicagoland area that offers something similar?

If you are searching for a more reliable long term result, you may want to consider buttock implants to restore volume and reduce the saggy of your buttock. Fat transfer can be effective but is often short lived and unpredictable. For the excess inner butt cheek fat, a lower buttock tuck also provides a more reliable permanent outcome than things like suspension sutures which give way over time or simple pull through the very heavy tissues of the buttock, especially after repeated sitting and flexing of the gluteus muscles during everyday activities. Make sure the results you are looking at are of similar patients to yourself not just models whom are barely in need of a procedure of this sorts. Hope this helps. 

Hello dear!
Thanks for the question and provided information as well.
Unfortunately, without pictures, it is very difficult to give you a proper answer. When choosing a plastic surgeon, the most important thing to consider is that he or she is board certified. l recommend you to make an appointment to talk about your goals and anything you need to know.
Good luck :)

The Miami Thong Lift is different marketing term for a BBL with liposuction of the area above the buttock. See link below for examples.