If anyone is intrested I've a Nvidia video card with broken processor which has 4 samsung ram chips which look similar to the ones Z uses.

The chips are:
SAMSUNG K4N51163QE-ZC25

I'm not sure if they are actually good for the Z ram expansion mod but if they are I'm willing to donate them.
PM me or drop me an email if you are interested.

N.B.: They need to be desoldered from Video Card PCB