I have a lovely Stubben Tristan for our youngsters and then move to the Stubben Genesis D Special when they are @ five years old. I also have a couple of Stubben jumping saddles with upswept panels, A Porthos and a Zaria.
"Where knowledge ends violence begins." B. Ljundquist
My short backed oddly tweaked model goes best in a Reactor Panel saddle, might want to check them out if you're still looking for a solution. It's a very different panel system, horses either love it or hate it in my experience. With the ultra compact GP horse I ride, it accommodates his double twist and keeps him very happy.