Re: PGB Pole spacing
If it was a Humbucker (as opposed to a Trembucker), the 49.2 should fit it. But technically, you need a Duncan cover, which is 49.022 mm, for best results. You might think that 0.178 mm shouldn't make a difference, but IME, it does. For the best fit on Duncan pickups, you need Duncan covers. Same with DiMarzios. Only their own covers fit them perfectly.
The original magnet was an A2.