Thanks for the replies. It appears I got ahead of myself in the parts department. The (borrowed) floor corker had a problem with the pin that goes thru the handle. It is a shoulder bolt and not available in stores. The problem was the bolt had worked loose and deformed the hole in the frame. Consequently, when you pushed down the lever, the arm would deflect to the side and the plunger was offset. Reforming the handle was a poor solution. I subsequently put a piece of metal behind the nut holding the bolt to prevent the movement. Appears to be working. Will have to cork some wine to test. (Darn!)
Thanks again.
PS: A big advantage to making wine in the North country is it cuts way down on fruit flies.