It seems you have an out-of-the-ordinary fit and have collided with the reality that pack makers aim at the boring center (statistical mean), which means folks off-center have to "make do."

Modular pack lines are a good place to start. Before that, I'd try to find a shop with pack fitting jigs to get reliable measures, especially if you've been relying on a tape measure to get your torso length. I did so after years and years of thinking I had a correct torso measurement, only to discover I was two inches off. The Gregory fitting jig was the best of those I've tried.

ULA might have a good pack for you, and it will be light whatever the model. Buying from Austria could be...a challenge but they have great customer support so might be able to help.

Good luck!