Ron, I haven't had to do any work on my front parking/turn signal lamps (thank goodness). I know the housings are now in repop form, so the harness is most likely.

As for the replacement of rear sockets, you'll be better off replacing the whole harness IMO. I spent more time and money than I like chasing problems down by just replacing sockets. I finally shelled out for the rear harness and have been trouble free since. Yes it's expensive, but what isn't with automotive restoration?