Sadly, the call for that (at least where I play!) is extremely limited. In the US, there isn't nearly the market for theater organ and ballroom music as you get in Europe, something that often sets us at odds with most arranger manufacturers.

If the Wersi rocked harder, or jazzed smoother, or funked your brains out better than the Big 3, it might stand a better chance over here, but there just isn't much of a Reginald Dixon fan club over here..!

Sadly, the influence of American pop music on the world is pervasive, but it's influence on the voicing and style making for arrangers is still a bit behind the curve. Wersi, especially, still feels mired in the ballroom Burt Kaempfurt, Klaus Wunderlicht beer-hall scene, which may do wonders for their sales in Germany, but leaves most Americans a bit cold, IMO.

But the next time the majority of my repertoire consists of light classical works and schlager, you can be assured I'll take another look at the Wersi's!