Call 1-800-558-1234 for a free catalog or see www.vandykes.com. Once you get a
restoration catalogue like this, if you don't find your door knobs there you
are almost certain to in the half-dozen other restoration catalogues that will
soon appear in your mailbox.
Another way: haunt salvage shops--they might have what you want, with a slight
patina of age, at a much lower price.