Electrical Fuse/Relay Box

I am looking for a source for the connector pins used in the engine bay fuse/relay box or the manufacturers part numbers. The factory fuse/relay box has spare unused locations for fuses and relays and I wanted to add a light-bar but keep the wiring looking factory. I had thought about using an wrecked car's fuse/relay box but the wreckers are asking AU$150+

Have you considered using a fuse tap adapter? I'm not sure they fit very well inside of the fuse box, but prevent having to cut into the stock wiring.

Something like this:
Thanks for the suggestion, unfortunately I also want to add a relay in the factory fuse/relay box also. I have a spare relay location next to the high beam relay which will be perfect for controlling the lightbar.