Files came today, some lovely photos.
No actual thickness values are given for the turret front in the test other then the depth of the impressions left by the rounds that struck. Which is still useful as it can tell us some information.
Deepest indentation into the plate was 69.85 mm
The only area that they do give an outright value to is the horseshoe around the gun, which was 44.45 mm as a round struck that penetrated and then was stopped by the mantlet proper.
http://i.imgur.com/wTkNbVP.png
http://i.imgur.com/y9ST8zU.png