I still have the cables if someone wanted to do that...although it would be a real pity and it would only be at zorro II speeds.
If the scan doubler is removed the card remains functionally identical. I moved my P-IV from an A2000 to a A4000 and it runs perfectly in Zorro3 mode. In fact, it's far more flexible as you can place the card in a non-video slot (wiring to the scandoubler which remains in the video slot) to work around a conflict with the Buddhaflash...