I have had a good look round with various contacts for a pulley for you but without success. It does seem most unusual, maybe it was damaged at sometime in its life but it may be worth getting that one welded and going with an electric fan.
Alternatively, if you are using a scrapyard database then include the Toyota HiAce as they used the same engine and there will be more of them in yards. Or you could always try Mr T's emporium.
Regards,