Anyone got one of these lying about? If so, could you take a quick
measurement for me?

I need to know the distance from the pulley edge to a reference point
(doesn't matter too much which one) on the mounting bracket.

I bought a pump on e-bay as part of a collection of bits to fit PAS to my
1990 90 but the pump came without pulley or the boss to mount the pulley on
the pump spindle. I've bought a pulley but the boss is not available
separately from the pump so I've had to make one. So far so fairly
straightforward (took a while to file out the keyway, but seems to fit) but I
don't know how long the boss should be in the axis of the pump shaft so as to
position the centre line of the pulley in line with the crankshaft pulley
when mounted. It's a belt drive so it won't need to be accurate to thou's,
but a dimension to the nearest millimetre would be helpful.

I can post a  pic somewhere to make this question clearer, if someone has one
lying around they could measure for me.

Thanks

Nick.