You can try here:Pretty unreal they charge $200 bucks for what is basically just a small pulley.
Anyone have a different source than Weiand? Or anyone have a 3.25" for a Weiand 177 they want to sell or trade?

Good Vibrations Motorsports
www.goodvibesracing.com
I've purchased pulleys from them, there's a lot of good parts available for blower motors.
Steve