Another thing to keep in mind, there is a stiffening piece on the back side of the sunvisor mounting holes that you will need to consider when cutting the interior panel portion out. You can see it here: https://photos.app.goo.gl/E94eMQKPDXhkHm4u6

You should be able to see the dimples on the inside where it is spot welded to the inner roof skin. I think you should be able to drill out those spot welds and keep this interior piece intact. Your new panel will need to be spot welded back to that inner brace. Your replacement panel is sandwiched between the inner a-pillar and this interior brace. Will be tough to get it in but doable i think.