TargaTT

Looks to be the same part number from toyota

Does anyone know if the front subframe mount (metal grey color, where the engine mounts go in to, as well as the steering rack) is the same for USDM and JDM models? My JDM one is damaged, and it seems there are a lot of USDM ones for sale locally.

You could reach out to some American importers, like the one I used to get MrGRT's car. More rare here, so the value is a little higher, although the price of import will set it back a bit. MrGRT's car was price perfect for condition, mods, etc according to a few supra owners/importers here. Use his post (https://old.mkivsupra.net/vbb/showthread.php?358473-1993-TT-Aerotop-Gz) as a reference.

As an update many years in the future. The assembly from Toyota is part 63203-14100. RHD/LHD is the same. $83-$110 depending on the dealership, there were 3 in America when I ordered mine. Took about 30min to do. 4 clips on the front of the roof. The open/close round part is a twist type, just twist with a little pressure and it will eventually line up and pop off. It's the shape of an o with an I in it, so you're lining up the clips from the I portion. Broke mine, super glue to fix.