Steve, the original fit used special brackets which are very hard to find now. I think you can get away with the traditional drilling of a hole somewhere under the bumper if you can't find the correct brackets.
Ted Schumacher (TSI Automotive) in the States was selling some reproduction brackets in stainless, but don't know if he still stocks them. Might be worth an email to him? Here is the website
http://www.tsimportedautomotive.com/contents.htm
As for wiring, you should find that most of it is already in place in the car, assuming it hasn't been bu**ered about by a PO. As far as I remember it is just the final connections at the front of the car that are required, once you have installed the lights. On late cars I think it is a red/yellow wire that supplies the power, & earths through the chassis.
Tony
<font size="1">1981 2L FHC Cavalry Blue - very original & not rusty!
1980 3.5L V8 DHC Regency Red - on the road again.</font id="size1">