As usual, I would tell you alpine type R.
And yes those adapters were from me. I have some to cut a new pair when I finally get front speakers but I really like those on the panel. And yes, they would defiantly have to be cut to fit and mounted properly to the plastic panel. Unless the speakers have a massive ass end I wouldn't image you would have to modify the metal on the door.
Now lets see some speakers in the rear doors! I about did one time but never got to it on my first one. I feel like it would go very nicely in your car.