If you can't get the genuine Renault parts could I suggest that you fit a pair of the WIPAC period reverse lamps. Made of stainless steel with a real glass lens, they look good. I've got a pair on my R4 and you can get them from Mini Spares - not at all expensive! Did the person who ruined your car offer to pay or is it an insurance claim? If so, buy a new bumper. If not, there's plenty of second-hand ones about.