'91 p/u: looking for knoeck sensor

Hi everyone.
I'm looking for a knock sensor and its wires for toyota 3vze engine
(it's a 91 toyota pick up 4wd).

Can anyone help?
How much does that cost?

we purchased our knock sensor an ebay for $8.00. The part was a couple hundred dollars at the parts store. So we gave ebay a try and lucked out.