hex guitar pickup?

[Paul Perry]

an analog jazz impro kinda guy has asked me about making an analog controller
from his guitar... I was thinking something like the early GR-300 Roland thing,
but modern technology... does anyone know whether the little stepped flat
pickup thing 
that comes with modern Roland midi guitar systems is a hex pickup that can
be used 
to source signals for this? I don't want to get involved in midi at all on
this one
and i dont want to physically hack the guitar.

paul perry melbounre australia