How much would it cost to get a good humbucking pickup for my fretless? and what should i be looking for in a humbucking pickup? it's to go in place of a rubbish split coil pickup that's about 4 1/2" from the bridge - about where a P-bass pickup is. i'm aiming for a really full, fat sound that has very little treble, kinda like the neck pickup on my Epi EB-3. can you help?