I just had another look at this .
One point that I don't think was addressed is this :
I have an Osprey Aether 70, which I really like, except for the hip belt. It is an isoform belt that was never molded
Why not take your pack in to a dealer that has one of those molding ovens and try that, it may work for you.
(obviously not that practical if the nearest dealer is 100 miles away...)
Franco