I would highly recommend getting merch online. There was a severe lack of finishers stuff at the main Nike store (I actually went to 2) in Chicago after the race (not sold out, they just didn't have it) and the lines were so long to get inside. If I recall, there were no womens jackets at the expo but maybe I got there too late.
If you want free medal engraving get there ASAP, the lines are really long - forgot what store did this, new balance?