Thanks All - Petrol 4.6 HSE with all the wiring and the switch in place and a fog lamp bulb warning on the dash. So I think everything is already there and they're missing due to a bumper replace as I have the plastic covers in situ at the moment. I'll look at the disco lights. We don't get much fog here in Perth and BCF/4wdsupacrap have some 36w that I think I could make fit. They're 36w instead of 55w and wondering if the BECM would see an issue/flag a fault?
Quick update - bought two cheap led lights that have eight bulbs each, cut the plastic in fill pieces to slot them in and connected everything up. Works great. Due to the angle they are good for night time off roading as they light up the track sides well. No faults on dash.