I'd be hesitant to use the honda.
Mk3 has a very heavy door, targa more so.
RHD, so Australia, Japan, HK, UK, passenger door (left side) hinges,
But yeah, that other part, the stopper (swing limiter thing) is probably worth looking at, and you can get at it without removing an 80lb door.
In my chassis (225xxxkm) it was definitely the hinge, once removed and held in the hand, and compared to the passenger side, one set was stiff/snug and didn't wiggle, the other clicked, jiggled and was loose and sloppy.
If you have to take the door off, masking tape the jams/door edges, and I use a milk crate + wooden blocks for height adjustment to hold the door for a 1 man install.