I’ve read all the sunroof stuff; some people make it harder than it needs to be.
Once you get the sunroof panel out (not very difficult - see Bentley), the cassette is easily cut out with a cheap air body saw. Cut out the inner parts first to reduce weight but leave the center rib that is spot welded to the roof.
You might get lucky - the bonded sections my car pulled off easily with a bit of heat in the metal.
I skinned the sunroof with a whizzer and had a friend weld it back onto the roof with some flat bar tabs. Filled the seams with short-strand glass fiber filler and sanded it down. Of course, that all requires painting the roof afterward, which I haven’t done yet. Looks like hell but makes for a very strong roof.
Good luck!