WELL NOW, WE BETTER DEFINE SOME TERMS HERE.
Are you speaking of the old style cup-base wadcutters of 70 or so years back or are you asking about the hollowbase wadcutters of the past 50 years to the present?
These are two totally different base styles and the terms are not interchangable and NEVER used interchangeably.
The newer style hollow base wadcutters are made by every bullet maker who sells 38 caliber bullets.
The only cup base wadcutter of which we are aware now is the SPEER 148 gr TMJ wadcutter bullet, maybe the coolest wadcutter bullet of all time