Looking for old MP supercharger set up or pieces

Pulley configurations can be challenging.
eGag has pulley spacers that can be ordered with a 2.25" female register (on one end to mate to the harmonic balancer) and a 2" male register on the other end. Vee pulleys and 6 rib serpentine pulleys are readily available. All of these are stackable and come with the correct Mopar 6 on 2.76 bolt pattern.
Have you considered adapting an Eaton blower from a late model car onto a an Mopar?