You know what would be kinda interesting is to locate that exact car. And didn't he own two of them? One for Beth Sarim and one for his Jersey digs?
As a classic car buff with some background in collecting, I'd bet that particular car is still around. The car clubs keep terrific history and pedigree records...may not take too much to locate it...then buy it for our own apostate purposes...
We could take turns dressing up as David or other "ancient worthies" and driving it to car shows....or better yet to the Kingdum Halls.