I've been having a hard (and expensive) job trying to find a correct navigation disc for my 2007 X-Type estate, I bought the car as a used model but without the original factory disc which had gone missing and after three fruitless purchases off eBay I am still not able to get an upload to my touch screen (message always says "This Is Not A Map DVD") getting rather frustrated now as there are a lot of so called "suitable" discs available all with different part numbers so can anyone enlighten me as to a correct part number for this model year also would it help if I removed the navigation drive unit in the rear to get the Denso part number?