[woodiewagon46]

If I'm reading your question correctly you want to remove the vent window and have a one piece glass. A lot of hot rodders do this, so I would ask the question on the HAMB. A couple of companies that come to mind are Specialty Power Window and Electric-Life. I don't know if your stock crank style equipment will be able to handle a larger window and you will have to fabricate a track for the front of the door.