Here is the Web address to Centaur
http://anvilfire.com/centaur/
I also recommend you search the auctions, estate sales, and local swap meets.
Just do not get fooled by the first one that comes your way. Read up on how to check the quality of old used ones. Search the web (Snap.com, Yahoo.Com, etc...) using the term
"backsmith" AND "anvil"
This way you will only get sites relative that contain both terms, This is the most productive...
I happened onto mine through word of mouth, it's a 120 lb Sliggo that rings like the "bells of St Mary..."
I want bigger anvil, but a 300 lb "lead" sinker is a waste of time.
I got my Mankel twin burner, blower forge for $50 through a friend whose mom saw an "sweet deal" ad in a newspaper. The forge was listed under a refrigerator, a sofa, and a b&w TV...
All I'm saying is tell all your friends, even the ones who might want one too. They might turn you onto one that is "too small" for their needs, you can always get a second one...
Good searching...