CTS is no longer making these. The market is flooded with 75 cent junk from who knows where.Here is the exact same tweeter as the 1038, but without the silver highlights, just all black (see link below). It is the KSN1056. If you want some, I advise you to stock up.
Also, here is another CTS horn, KSN1016:
http://www.martinsoundpro.com/item.asp?id=340
I think this is the same driver, but the horn lens is a different shape. I don't know how this affects the sound, or if this is a viable substitute. Perhaps Wayne can answer that.