Where's the cheapest source for instrument light sockets?

I have at least 2 dozen OEM sockets here. They aren't worth the cost of shipping. Plastic gets brittle with age, the tiny tangs are under some pressure from electrical contacts. Those sockets you might find in a parts yard that aren't broken aren't going to be any better than those you have. if you don't like to R&R that inst' panel, buy new bulbs and sockets.