Kunai are next to imposible to find, you kina have to ask a blade smith to make them for ya, that gets expencive...

Oh that sword you posted Coolman, its Clouds Buster Sword from FF 7, But it is similar.

Canada I don't belive there are any restrictions on owning there, hell I know a blade smith lives there. http://www.americanbladesmith.com/
Hes listed somewhere in their master smith section.

Heh I think you can even carry a sword in Canada, don't take my word look into the laws =P.

Oh on the Kunai I have a link for someone who makes non metal ones, props, not good for throen ether but they look cool. http://www.mad-props.com/catalog.html
Not the cheapest thing in the world ether.