Welcome David, it took me a year to find my car, I would certainly suggest that you contact dealers and let them know what you are looking for, many cars never see the showroom as the dealers match the cars with prospective customers as soon as they come up for sale.
Rylan
+1
And there is a scarcity of some models. We traded in our old 4/4 in Dec-13. It made the Allon White web site for about 3 days. They had a waiting list for older cars.