Two things: I’m sure current body armour is resistant to tasers, as the prongs need to hit you in order to work, and if your armour is stopping a knife or a bullet, two measly little pins aren’t gonna make it.

If you want a cheap and trivially accessible alternative to this, a fencing Lame will fit the bill perfectly. It’s a metal conductor in the shape of a vest or jacket. Whilst I haven’t ever been tazed wearing one, I imagine it would handle it just fine.