I've often relied on the factory rom repository herehttp://www.scoobypedia.co.uk/index. ... bilityList to get a known good base ROM. This is especially useful when you don't know the history of the car.
The issue is that it is getting out of date. I know there have been dumps of newer versions for model years listed and also dumps for years newer than what is in the table.
Who owns that site and how can I ask them to update it?