Indeed Jeff. As you imply, each of the lock units is however unique to its position on the car, i.e. front-left, front-right, rear-left and rear-right. (Front locks only, will also differ between LHD/RHD cars). There are two version of rear locks however, with or without the child-lock built in.
Here is the child-lock tab to identify the version:
Hi David, yes I know that but I was only talking about the drivers door mechanism in the UK.
1958 Ford Consul Convertible
1965 Ford Zodiac Executive, being restored
1997 Jaguar XK8 Convertible
2003 Number 182 MGZT V8
2004 MGZT cdti Poseidon
2004 Number 76 MGZT V8