Someone posted this on FB so I thought I'd share it. Might have to order some for DS...the wedding we were at the parting gift was a traditional chicago flavor combo of cheese and caramel which we passed on because there was no label info. He thought it sounded gross.
http://wellsstreetpopcorn.com/about-us/ (http://wellsstreetpopcorn.com/about-us/)
FB poster said it was available at Bed Bath and Beyond (she's posting from the St Louis area), so certainly could be a regional item.