I went through a friend of mine in Toronto. He's in the automotive lighting business.
I installed relays, 12 Gauge wiring, fuses, and Cibie e-code headlamp assemblies that take H-4 Bulbs.
He sells a kit that leaves the original truck wiring intact and has everything in it except the wire. No Sense shipping something you can get anywhere.

Awesome light. I leave my '99 Chevy at home when I get called in at night now.

Not cheap, but absolutely no comparison...

CJ