I'm looking for the old version of the DiMarzio FS-1 single coil, from the 70ies and 80ies. They had almost flat polepieces, like this (neck position):
http://www.mk-guitar.com/wp-content/upl ... strat1.jpg
The new version is more staggered: http://www.dimarzio.com/sites/default/f ... 10mg_0.jpg