Measured the bridge pickup, got 94.5mm or 3.72". Duncan bridge is 3.705",DiMarzio are updating their site so no specs,Nordy 3.72". Wilkinson is 3.72". Barts are 3.73".The pickups on my Dyna Unity are solid core.
Allowing for caliper variance it looks like Peavey used a standard size so you could put anything in.

