This is a little late, but I believe Mases got his Master Sword from True Swords. I got mine from Amazon but it's very good too. I've purchased other sword stuff from True Swords and they're really good.
Hiya! I'm Wolf Sage. You know, you say some of the most hilarious things in your posts... That thing you said about how you walked backward, back-flipped, and shuffled to the Master Sword was priceless.