The Libertyville office is now an "innovation center". I think the manufacturing floor is being used to make EV chargers by a company based in Amsterdam.
How about the Quincy office, near where Wavering worked and near where he and Lear were each born before making the product that would be the name of the company? Even the last little local sales office closed years ago.
I moved down to Texas from Quincy about a decade ago. I lived most of my life before that in Hannibal and Quincy. There's a lot of business missing up there. Gardner Denver I think moved their HQ several years ago but kept the plant. Moormans sold. Quincy Soybean still has some work there but sold and closed the HQ. Building Technolgoies closed in Hannibal in the 80s. They never rebuilt the grain elevator at Hannibal after the 1993 flood. Buckhorn Rubber closed about a year ago. They never rebuilt the trainyard at West Quincy after the '93 flood either. I'm not sure if Harris still builds broadcast equipment there or not. I think Knapheide and Hollister Whitney are still doing well.