Legend of Zelda...

funny you should ask this as I started a thread about it a long time ago
unfortunately a functional replica does not currently exist and you would have to go custom which'll run you a couple thousand
if you feel like going this route my vote would be for either fable blades, odin blades, or maybe baltimore knife and sword,

alternatively if you dont care for function and just like the look of the sword there is some wallhanger stainless steel ones available that you could find rather easily on the internet
but be advised that these are Wall-Hangers ! and not functional swords dont attempt to cut things or other real sword activities

no such thing IMO
but this one looks decent
www.replicadungeon.com/zelda-twilight-princess-sword.html

Depending on how fancy you want to get, a custom may not be outrageously expensive. I know BKS did one for stage combat awhile ago, and their monosteel customs are considerably less than a thousand bucks in most cases. You could also try Odinblades (John has done some very nice fantasy customs), or Tinker, but I don't know if he'll do a master sword. You could also go with Brendan from Fable Blades.

Hope that helps,
Alan

Here's one I made for a client...
-Solid Bronze guard and pommel ... painted
-Cast Resin handle, reinforced with glass filler
-5160 spring steel blade
-Total weight was 9.5lbs