The thing about DiMarzio magnets is they're sightly off spec compared to Duncan/Gibson/most other manufacturers.
So if you try to just swap one of those magnets in there, you might get it to fit, but the bobbins are going to end up all crooked.
Plus I've noticed the PAF Pro actually has a slightly oversized A5 magnet. Not double-thick like an X2N's/Super Distortion ceramic, but not as thin as other DiMarzios with A5.