Finally got the new coupling. I am pretty sure this is brand new, as nobody in the country had one, but here it is...
This pic is the new coupling on the left, with the one every other Supra uses on the right. Bottom line...no contest! The newer one is heftier and uses nylon bushings that remove all play. You can see the original just uses a strap to hold the bolt that goes through the tiller arm. Lame.
Here, the bolt hole closest in the pic is where the steering flex cable attaches. The larger bolt is the one that goes through the tiller and bolts tightly to the arm. I honestly can't believe we have been using that chinsy coupling all these years.
So, the play in my steering is less than half what it was at the wheel. This is an upgrade I highly recommend!