Flooded market for break barrelled springers.
Any premium rifle would have to show premium accuracy and shooting ability which wouldn't be easy to achieve in a break barrel.
Bent barrels from use are a common issue with break barrelled rifles; which in plus 12 ft/lbs guns is even more of an issue especially if "left to fly".
Break barrel rifles tend to be more sporty and lighter weight. Far less forgiving and difficult to shoot well than a heavy weight underlever. Gasram a slightly more forgiving power plant to use, but then someone else does those well already.

Add it all up a premium break barrel springer would be a heap of trouble.

AA already make two fantastic spring guns which do shoot straight and look fantastic. A type worth the premium as they ooze quality and will last so a pleasure to own.
Better to invest in the new technology which is PCP.