Is there one on their site that I can buy I cant seem to find one any advice or links would be appreciated.

Thanks

 

Don't waste your money on a wiring harness unless yours is absolutely in pieces, spend about $50 on a soldering iron, extra solder, wire of all colors, heat shrink, and a 50 ft extension cord, and just extend wires to reach the sensors.
If done right it will last a long time.