The thought of which side the sliding door opens never occurred to me. I did a quick search of RH sliding door but didn't have anything show up.
I am getting off topic here, but bringing a vehicle back for resale is intriguing and to be honest has got me looking. There are quite a few dealers who go to auctions around base, and I have seen some post on facebook. Most Hiace's seem to be diesel, which runs me into the same conundrum of registering it here in Tokyo.
The 4x4 "super customs" look pretty rad and those in good shape seem to be selling for fairly cheap at auction.