As far as I have been able to determine, the only MM style p'up that's humless when running single-coil is the Nordstrand MM4.3 Someone please prove me wrong! Do I really only have one option for this pickup? edit: looks like the Bartolini MME will work too: http://www.bestbassgear.com/bartolini-mm-pickups.htm costs nearly as much though... another: EMG MMTW http://www.emginc.com/displayproducts.asp?section=Bass&categoryid=37&catalogid=188 looking up pricing... list $143. Ouch. comes with pre-wired pots and tone controls though. Another: Seymour Duncan SMB-4a 3-coil Direct drop-in for stingrays, would be very weak passive. "For use with stock Music Man® pre-amp"