Where can you find information about a Chicago candy company called something like Lanzers or Lenzers which was still in business as late as the mid-1970s?

My cousin used to work across the street from Lanzi's candy where they made the cashew nut crunch bar I was searching for. A film called Shelf Life is in the works.

Can't believe I went to the web for answers when the information was right within my family!