Thanks did some probing and came up with the fact the 2004 Di zd30 has a 14 pin Grey OBD2 pin and I can get ECUtalk for $97
does that sound like the right price, all you get is plug in lead 1.5 long to a USB, if that's right I'll fit a 10" screen in the dummy glovebox lid.
Have also sent a message to Scangauge on Ebay.
I'll get an answer one way or another