If you want, classicsax radio has many recordings of Rascher himself that are not available on cd anymore, as well as recordings of John Edward Kelly, James Houlik, Lawrence Gwozdz (Rascher players), and Marcel Mule, Delangle, etc. (French Players).
I have to say listening to Rascher is interesting to say the least. I suspect it has to do with the nature of the recordings, but his sound is sometimes suspect. However, the musicianship is undeniably there. At times I am unimpressed by the so called "master", yet at other times I am completely blown away, more so then any other recording of classical sax that I have heard. As for Mule's sound, I actually prefer his style of play to modern French.