Hmm, this would be a little difficult, and too late to do, but, try bondo, and form it to fit the window. But you already painted. So it's a little too late for that.. but that is what I would probably do..
__________________
Work(s) In Progress:
'70 Chevrolet Chevelle SS 454: Painted, needs the details to be completed.
'94 Chevrolet Impala SS: Painted and paint got screwed up. Possibly starting over. Needs a bunch of work.
Gran Turismo 4 Progress: 100%