Links
BudK - Carries a wide variety of items along with its selection of knives, swords, etc. And reasonably priced for the most part.
The Noble Collection - Specializes in replicas from popular movies like Harry Potter or the Pirates of the Carribean. Not just swords and weapons, it also carries a wide selection of jewelry replicas and other items from the films.
Smokey Mountain Knife Works - A large selection of knives, swords and other items.
Ebay - Another good option is to check eBay. They will often have items you'd have a hard time finding elsewhere and you "might" get them at a good price if you aren't in a bidding war.