Ok, sammyz and I have discussed the situation about the kdz vs cab, and the winner is: kdz
Because of this, the links in the OP have changed to kdz files. Unfortunately, this means the old links have been removed and will not be used in the unbrick/unroot guide, but better to correct things now than later.
All the firmware are now posted in kdz format- C thru F
We need to keep this going, so Big thanks to all our volunteers.