It is very difficult to find the first sword, due to it's lack of popularity. Both because the Shitai and Bankai have more flair, and the original sword has been unheard of scince he first released Zangetsu. The second sword is also difficult to find, or, more at least an accuarte repilica is difficult to find. It's so huge that they are hard to make and ship. Your best bet, if you really must have a Bleach anime sword, is the Tensa Zangetsu (Bankai) form of the sword. It's small, and very popular. In fact I would personall recommend that sword of the others for its asthetic value. Just my opinion, tohugh.
UPDATE: I've looked around the internet and have found no such blade for sale, or even a picture of a replica, for that matter.
UPDATE 2: The answer is no. I've looked on several sites, and not one replica. Sorry, looks like you're out of luck. Don't lose heart because you cant find this, though. There are many other intersting swords in the world, so if you can't get this one, try another. The only other way to get this is if you're filthy rich and can have it custom made...
Anyway, the origional sword and Rukia's swords are two differnt things. The first Zanpakto was Zangetsu, Rukia has a different one.