On the affordable side, there's http://www.honecksculptures.com/
Butch makes them himself and I've met him at numerous furry and sci-fi conventions. He uses the "lost wax" casting method so all details are retained from the wax original. He makes real and imaginary critters, cloak-clasps and garb thingies, crystal ball holders, etc.

http://www.loetvanderveen.com/ is definitely in the "high rent district" but I adored his sculptures when they were in a gallery near my job.