First, the ceramic version is the exact same winding with a different magnet. BKP doesn't recommend swapping them yourself (I have personally broken a couple of humbuckers between swapping magnets and hybridizing experiments). But the process isn't hard at all (in fact there are several YouTube videos that show the process in detail). As far as sourcing different magnets, there are lots of places that sell them. Mojotone, Stew Mac, AddictionFX (my favorite, cheap and fast shipping), Philadelphia Luthier Supply an many others. Depending on your setup I have no idea whether a simple magnet swap will accomplish what you need, but experiments are fun!