I rang CAPA this morning who after a while of being on hold told me they don't sell them (despite there website saying otherwise).
Reason is because it would over rev the blower yadi yadi.
But then he tells me he has a 2.2" one...

So, anyone know where else to get one? Waiting on a responce from Tim @ Raptor SC.

Maybe use the original machine it down??

Either that or buy the smaller pulley and get a larger crank pulley to match?

The answer is http://www.928motorsports.com/parts/6ribpulley.php cheaper than CAPA aswell.