the 32mm wrench is to thick to wedge in depending on the model you have whether earlier or later. What I did was I machined/planed a 32mm wrench down
to make it thin enough to fit. However you will still need something to hold the water pump pulley. I used a small wodden block or pry bar and wedge this between the pulleys to hold it from spinning while tapping the wrench. You may or may not get away with the pulley NOT turning. But if it does..no amount of hard whacking with the hammer is gonna remove it.
the other thing you can do is go to Sheridan Mall in Toronto. (Jane st/Wilson ave) there is a tool guy downstairs who has all kinds of stuff. He should carry that for the M20 engine. it comes as a set. but I think it's around 100.00