WHAT SIZE PULLEY FOR D1SC AT 10LBS BOOST ?

I NEED TO FIND OUT WHAT SIZE PULLEY TO GET THE BOOST DOWN TO 10LBS. ? ON MY D1SC CARBED PROCHARGER.

AND WHERE IS THE BEST PLACE TO BUY ONE ?

THANKS , TIM

I don't think this question is generic enough. We don't know the size of your motor, what heads, what intake, intercooled or not, how high you're turning it, etc. If you want people to help you, try asking something a bit more specific, give us some details.