looks like a nice car, Cat D or not, who cares for that sort of money, just enjoy it...
Repair costs would have been sky high, and not something that an insurance company would want to get involved in repairing, especially if a new door shell was NLA at the time... previous owners, would have been likely to have received a very good deal on the claim, they either bought the car back, or let it go to a salvage dealer... who possibly nabbed the OE wheels, hence the G60s
Thom