Guitar Pickup Magnetics

[bassnut]

I'm building a bass guitar pickup of an older design which uses two bar magnets on either side of steel laminations with steel cylindical pole pieces running through the laminations and a copper coil.
Could somebody tell me which is the best material to use for the laminations and pole pieces and where I could get it in small quantities? I noticed that when I disasambled the origional, there was no residual magnetism in the material.
Thanks.
Fred

 

[Kasper]

First
The laminations material has no effect on pick up, as long as it isn not electrostatic shielding the poles.
The poles should be some Ni-Steel alloy, but any ferro-magnetic Steel will do. The magnets are the main problem to purchase. Perhaps it is possible to remagnetize?