I got mine at the parts store, Dayco was the brand. Took a video this am of my noise ill try to upload to see if anyone has an idea. I can't tell if its my pulley, possibly bad new pulley, or if its the intake boot issue. What's odd is in neutral or park it goes away. I hear it the most in drive while completely stopped.
2000 323iT - 158k
Recent Maintenance: Spark Plugs/CCV/Expansion Tank/Radiator/Thermostat/Both Intake Boots/Air Filter/Cabin Filter/Valve Cover Gasket/Control Arm Bushings/All Pulleys/Hatch Shocks/Vanos Oil Line/Fuel Pump/Fuel Pressure Regulator/Rear Rotors & Pads/Belts/Water Hoses/Front End Links/Front Sway Bar Bushings/Alternator/Power Steering Hoses/Power Steering Reservoir.