Since you have the doors off, look down inside the bottom of the door...the parts may have fallen down in there, as a likely scenario in that the disk that screws into the lock barrel with a screw vibrated loose and fell into the door.
If you can't find the missing pieces, there are a number of Alfa Romeo junkyards around who may be able to help, such as Alfa Parts Exchange.
You can buy new keyed lock barrels from a number of sources.
If you can't find the missing pieces, there are a number of Alfa Romeo junkyards around who may be able to help, such as Alfa Parts Exchange.
You can buy new keyed lock barrels from a number of sources.
