I will check in my garage next time I am there, but I'm 70% certain that I have another passenger door with the hole for the lock ... as for getting barrels to fit, that may be another question .. however IIRC a screwdriver/aerial key should do it
Pretty much standard to have a key lock on the passenger side of a two door but very rare to have on a four door or van, even if the vehicle went for export!!
I think they were originally meant to be fit on the left hand drive export models only. Nevertheless, like most thing over the years you see them on UK speck cars