Vendors are no longer allowed to provide winpe directly.
I got a message fro Paragon asking everyone to d/l from thier paragon account before 30/3/2012.
At first it seemed that might have been a disagreement between Paragon and MS over licensing costs.
However, there is this message on Paragon downloads page:
( Paragon will be providing a way to make winpe on your own machine. )
It seems it applies to all software vendors.
Therefore it is worth its own thread.