Go for the BIC or driftmotion ones, your swapping a motor into the car that does not belong or look at all stock there and your never gonna be able to see those brackets due to their location under the intake and exhaust manifolds. Don't sweat the motor mounts, trust me, you have much bigger more important things to sweat about when you do this swap, LOL.
If you find a set of actual 1JZ engine mounts for the post 89 MKIII chassis I would be very surprised. On top of that the cost that someone will ask for such a rare find is not going to be worth the price considering the fabricated steel ones are equally as good if not better.