Can anyone help me?

The previous post got me thinking about a poster that the Ontario Ministry of Labour put out in the early 90's. It was a circa 1930 photo of an elderly striking worker wearing a sandwich board calling for a 6 day working week. It hung in my office for years but I misplaced it and I'd like to get another one. I've done an exhaustive search of the web but came up with bupkes.
Does anyone out there know where I can find one?