I found a link to this phone number for Artistic Brass. 800-251-2390
However, the same website listed a number for the Broadway Collection, and they have been defunct for several years, so I don't know how current their info is.
In poking around the net, I found several companies selling faucets with a very similar swan design spout, so who knows what that really is, without a catlog to compare handles.
Most of these "artsy" companies were design studios/foundrys who made the brass and decorative parts. They were buying the valving from an established faucet company. As mentioned, Aritistic Brass was using PP innards. Probably if you take yours apart, and post a picture of the stems or take to a plumbing supply, we could identify those parts. As for replacements for handle or spout parts, the odds are against you. There are a few very large parts suppliers in NYC, sort of old time hardware stores with a large dark dingy cellar most of us would die to prowl around in. That is likely the kind of research you would have to do to find parts for this dinosaur.