Zombietools.net has for sale a variety of zombie-slaying elements that’re the real deal. They’re actually made of metal and actually could (in theory) slay a zombie. If push came to shove it could probably slay a normal, un-undead human also.
However, such stylish debauchery (as is so often the case) comes at a heavy price. The To-Handed Apocalax, for example, will set you back about $375. Or, if you prefer, the more modest Urban Bone Machete Mark II is $250.