Would it be for a car that has no B-pillar between the doors?
Didn't the old London taxis have this configuration with a conventionally opening door at the front and a suicide door at the back?
I was about to suggest the MG Y-type but then realised (a) that the the doors are in the reverse configuration opening back-to-back around the B-pillar and (b) they don't have a trim strip across the bottom of the door openings.
dan