I fixed one once and didn't want to weld so I cut a patch out of another car and screwed in in with 4 sheet metal screws, bolted in a factory radio and used a uncut instrument bezel which hid the plate and screws, I figured I'd weld it in later if I ever redid the car, but traded it several years ago. I wouldn't want to cut up a good dash structure now days, but they were plentiful back then. You could measure and cut a plate out of sheet metal.