I guess you missed the part of the thread where I mentioned that I was OK for the 36mm wrench (same size as some early Falcon fan hubs - easily obtainable), it was the holding still that was the problem.
And Blknight.aus certainly came up with a good list of suggestions of how to hold the waterpump pulley still in the absence of the "official" holding tool LRT-12-093, which is not so easy to get hold of.

