Master Cylinder Question

[Eric Straub <ericst@MICROSOFT.com>]

I was cleaning up the master brake and clutch cylinders (from '67 Mk2 Spit)
last night when I noticed that one of them (the clutch mstr cyl) has "Made
in Australia" stamped on it. That one has a plastic lid. The other one
(brake master cyl) has "Girling" on it and has a aluminum lid.

Am I correct in assuming the one with "Made in Australia" is not original?
If so, does anyone know where to get a NOS original one?

Thanks,
Eric.