However I couldn't see anything inside the door so I'm assuming its fixed to the door and not separate. I may pop into Fiat to see if they can confirm.
Did you have any luck with that?
I thought I needed a new check strap, turns out that the mount on mine is broken.
not an easy job to weld either - ALL the electrics are bundled together & firmly fixed all the way down the inside of the door, right up against where this plate is.