Have you guys considered making a humbucker using the same concept as the Five-two single coil pickups? I put a Five-two in the neck and bridge of my Strat (Alnico II in the middle) and I'm really diggin' it!
I'm not on the staff, but I think that because a humbucker has a bar magnet and not polepuices, the 5-2 concept would be somewhat difficult to carry out. In a StagMag type design though, it might work.