It kind of makes sense - the factory would want fewer parts so the fit wouldn't require bushings, but for the aftermarket Hurst would want one universal part to fit their rods. From Brewer's site: Shifter fingers have the larger .500″ diameter holes for Hurst aftermarket linkage.
This one could even be made from various factory/non-factory parts.
I'm tempted to just buy a new shifter. :BangHead: