I made the background in full, and as a completely separate layer, so that it could be used without issue in all three panels. It somehow didn't occur to me that the third mannequin would wind up almost totally obscured by foreground characters and dialogue balloons.
With that in mind, and because I like the other two mannequins as well, here is the background on its own:
The second mannequin is rocking Ashley's outfit from when she first really talked to Elliot. The first is keeping warm with a faux fur jacket and short shorts (because I can totally imagine this happening in advertsing and it amuses me), and the third, well... The third is additional evidence that I have Yu-Gi-Oh! on the brain.