More news--I contacted Robert White, which happens to have a number of Noblex filters at very reasonable prices on their website, but not the one's I'm looking for, and they say they are also having a difficult time dealing with Kamera Werk Dresden at the moment and have removed Noblex from their website, except apparently for current items in stock. The company has apparently been "refinanced--again."

I suspect they must be taking a hit from all the stitching software out there, pano heads and such.