Somebody linked this to a BaT auction discussion but I thought it would be appropriate to link here as well;
http://vs57.y-block.info/history.htm
Today there are 2 Paxtons - Craig Conley bought the rights to the old ball drive style. https://paradisewheels.biz/super-chargers
In the 80s I loaned some SBF brackets to Paxton in Santa Monica so they could copy them to bring the Shelby kit out again. Going through my desk a few months ago I came across the card of the guy I talked to. Today he owns Vortech and is offering his new style Paxton for Mustangs.
(https://i.imgur.com/AGkVw5hm.jpg)
https://vortechsuperchargers.com/collections/paxton-superchargers