I had what I thought was a decent deal going on a G50/52 from Holland awhile back, but by the time I got the thing export crated & shipped to the US, paid duty on it, etc. it was going to cost me $6K, so I bought a known good G50/52 core from the rebuilder for $6.5K.
BTW, I've got a "spare" G50/03 transaxle if anyone is interested. I own it for around $4K and am open to reasonable offers. It's from a '91-'93 car, and has the factory LSD. I've not cracked it open, so have no idea what shape it's in.
On the advise of several transaxle experts, they felt the torque of a 6.0 liter V12 was going to require a "built" G50/50 or a G50/52, so I went that way instead.
This G50/03 would make a nice box for someone with a 1UZ powered car, particularly if they were staying NA with it. It would probably even handle a turbo 1UZ if the car wasn't too heavy, nor had huge sticky tires, and the clutch wasn't dumped at every launch.