Window glass guide rubber for sedans?

Look up Just Mopar. He carries 4 door trim parts.
I did what you described using the 2 door whiskers on a 4 door 67 Dart.
They do not fit with out major work.I got them to work but will never do it again.
They do make a tool to remove them that slides between the glass and whisker clips. When you pull up on the tool it releases the clips but it ain't easy.