Joe Dircks.  Now there is a name not many know.  I met him when I was 32, 30 years ago.  He use to vacation at a little hot springs somewhere in new mexico.  Went there to meet him.  I remember that he had retired, the first time, the year I was born, 1943.
Joe, of course, made two straightline progressives, the Dircks and the Tri-Standard.  Still have his pictures of those, I think.  The Dircks, as I recall, was totally automated.  Electric motor to power it.  The Tri-Standard, made some years later, was hand powered.   Don't remember the company history anymore.
One thing you might consider is calling Tony Sailer.  Last I knew he still lived in Owen Wisconsin.  I think that Tony got rid of most of his press collection but you never know.