Thanks, I'm following a few UK leads with Jap 4x4 parts companies. This pulley is shared with some other Toyota models such as Landcruiser, etc. It's not actually the fit onto the crankshaft that's wobbly, it's the outer larger ring of the double pulley itself. I don't quite understand how they fit together - some kind of rubber flange? Anyway, I spoke to my UK mechanic and he's clear that a new one is essential - a repair could cause serious problems if the pulley becomes unbalanced.