I don't see any reason to spend that kind of money. A car radio is not a show piece inside, so I see no reason to keep original looks, but newer caps are much smaller than old, and you can actually "gut" the old tin can electrolytics (with a little work) and slip new ones in from Digikey, Mouser, etc.
I do agree that caps are probably the no2 problem area after tubes, assuming a tube type radio.