I used to have a full set of "how to" instructions on this, but seem to have lost them. I'm sure someone on here will be able to help you with the correct sizes, etc. But you will need: A fuse, a relay and a switch block that includes front fog light switch (any wrecker with a suitable donor Astra will suffice). The wires for the lights runs behind the bumper bar and should be there already.
Good luck, and don't forget to post a couple of pix when the job is all done.