I just completed the rebuild of the window frames on my 64 544, including new fuzzies,new vertical channels, new vent window rubber seals, and repairing the vent window latch mechanism. I ordered the parts from Vintage Import Parts in Canada. E-Mail address is vintage@telus.net
Be advised that installing the new fuzzies is pretty difficult. I used #6X1/2 inch countersunk phillips head sheet metal screws for the parts that are attached with screws, and hand made square top stainless steel (.065 dia.)wires on the pieces held by metal wire. The window does not have to be removed from the door, but does have to be unhooked from the roll-up mechanism and lowered to access the screws on the lower part of the outside fuzzies. This step requires removal of the door panel. The new fuzzies have no holes in them for the screws or the wires, so you have to locate and drill the holes. This is the time to replace the vertical channels if they are significantly worn.
I'll be happy to answer questions by phone or E-mail. JIM
The finished job looks as new