driver side door handle lock pushed in from break in

driver side door handle lock was punched out last week, in parking lot, the
door actuator arm drop with the lock into the door. they couldnt open door
and left it alone... glad for that...

Need tips or adive to replace handle also face of lock is press in
i hope to take all apart and straight it out. any advice, im guess the lock
is big bucks to replace?

anyone buy a Electronic immobilizers, and install them selfs
looking to buy a unit and install one. looking for feed back?