I've been trying to get hold of one as well.
I went to one dealer and got told the same as you, that they needed to do a manual order, so they did this and then VW in Germany said they will only sell them to people whose car is 93 or newer becuase they haven't got many left.
I went to another dealer today who checked and they rung another dealer to check too and they said they were obsolete, don't know if this true.