Never used them, but you don't have to have an intermediary to do it. Just call a local salvage yard, almost all of them are on a national data base, they put out a request for a specific part, and all the other yards that have that part reply.
As far as rust goes, ask them for pictures of the actual hood before hand.

Or you could place a parts wanted ad here. Best place to get one, in my opinion. Doesn't cost anything for the ad either. And you might find one close to you so you don't have to pay shipping, which isn't cheap.
Russ