Hinges for 3-dr have been NLA for some years, unless some more have turned up since I looked. My 3-dr hatchback
had the same problem. As these doors are longer, there's more load on the hinge pins than in the 4- & 5-dr.
I diagnosed it as wear at the hinge pins, and lifted a door off to investigate. This is possible without unbolting the
hinges if the door is opened wide enough. On mine, the pins weren't obviously worn, but the mating holes were. I
discovered that a quality design job had been done, and the holes were bushed with oilite bushings. It was possible
to drift the bushes out for replacement. Unfortunately, I couldn't trace exact replacements, and ended up with a
PTFE-lined equivalent, similar to
this.
Note, I'm not sure at this distance in time that this is the exact size I used.