Any competent machinist could do it. You don't need a diemaker or someone with Durst background. But it might be simpler just to start over with a completely new punch and identically matching pin bar. Ideally, these are made at the same time. Otherwise, it's helpful to have a punched master reference on either dimensionally stable polyester film base (not acetate) or brass shim stock. Tolerances need to be very tight on this kind of gear.