Daaaanz67 - Classic parts has this:
http://www.classicparts.com/1967-71-...ctinfo/18-778/
Never used one so I cannot comment on it. Maybe someone who has can.
PanelDeland - I did some research on the silicone lubricant and now understand it dries so no worries on this stuff sliming up the window. I will get some this weekend and see if it helps with my son's truck. Thanks for the tip.
Thanks!