I know it's on eBay but I don't have an account on the site so I can't bid or buy it!
and I all u need is some steel, a rod, chain (+ keychain of Mickey's head), metal welder, and some paint, a blueprint of the keyblade, Sandder for smoothing and leather (grip).
or u could just get a black smith to do it for ya, cost ya a bundle of money!
or just buy one from eBay!
the other two keyblades are not on eBay anymore (Kingdom Key and Heart Unlocker)