I had a LHD version in my HJ75 in Panama, but I don't specifically recall them being in the 40 series, but I would think they would have been in the 40 and 47s. Surely Marv could get them. RHD may work for you though, as my 60% side is just as comfy as the 40% side. I have seen a few rigs here with the 60% seat in place, and some cushy bucket in place of the 40% side... I wouldn't recommend that look though.
I have 95 4 Runner SR5 seats in Patches, and they are the most comfortable seats I've ever had. They are fairly thick, though, so I doubt they would be good for a pickup unless you were about 5'2".
Josh