Hiya
I had an issue on the tailgate on my ‘93 3L (diesel) LH-129 which may help you. The tailgate would open from the inside but not the outside.
On mine, there’s a large access panel on the inside, under the rear windscreen. It’s easy to remove and the fasteners are visible.
Once it was off, the broken bit was obvious (I’m afraid I can’t remember exactly which bit was broken though!) and it was a cheap part that Toyota got hold of for me through the parts desk, 25 quid or thereabouts I think.
I seem to remember needing to remove a bit of trim from the outside around the handle to fit it, but again, it was an easy job - old school screws/bolts etc.
One of those jobs that I put off for ages, but once I bit the bullet, it was quick and easy and I remember wishing I’d done it sooner.
Can you see an access panel on the inside? If you can, my suggestion will be to take it off and take a look - hopefully it will become clear.
Hope this is of some help
Niel