Lots of places you can order them --
http://www.fcsurplus.ca/shopping/shopexd.asp?id=1653 for example.
But if you get caught wandering around with one, good luck on persuading the RCMP that it's something other than a weapon.
$1:
“weapon” means any thing used, designed to be used or intended for use
(a) in causing death or injury to any person, or
(b) for the purpose of threatening or intimidating any person
and, without restricting the generality of the foregoing, includes a firearm;
Possession Offences
Possession of weapon for dangerous purpose
88. (1) Every person commits an offence who carries or possesses a weapon, an imitation of a weapon, a prohibited device or any ammunition or prohibited ammunition for a purpose dangerous to the public peace or for the purpose of committing an offence.
Punishment
(2) Every person who commits an offence under subsection (1)
(a) is guilty of an indictable offence and liable to imprisonment for a term not exceeding ten years; or
(b) is guilty of an offence punishable on summary conviction.
R.S., 1985, c. C-46, s. 88; 1995, c. 39, s. 139.
Carrying weapon while attending public meeting
89. (1) Every person commits an offence who, without lawful excuse, carries a weapon, a prohibited device or any ammunition or prohibited ammunition while the person is attending or is on the way to attend a public meeting.
Punishment
(2) Every person who commits an offence under subsection (1) is guilty of an offence punishable on summary conviction.
R.S., 1985, c. C-46, s. 89; 1995, c. 39, s. 139.
Carrying concealed weapon
90. (1) Every person commits an offence who carries a weapon, a prohibited device or any prohibited ammunition concealed, unless the person is authorized under the Firearms Act to carry it concealed.
Punishment
(2) Every person who commits an offence under subsection (1)
(a) is guilty of an indictable offence and liable to imprisonment for a term not exceeding five years; or
(b) is guilty of an offence punishable on summary conviction.
R.S., 1985, c. C-46, s. 90; 1991, c. 28, s. 6, c. 40, ss. 4, 35; 1994, c. 44, s. 6; 1995, c. 39, s. 139.