Are these the single piece headlights with the large rectangular lens over a pair of reflectors? LIke this one?
If so then good second hand ones or NOS ones are pretty hard to come by to suit right hand drive cars and even then you might have to settle for the Siem units out of an HPE rather than the Carello ones it's supposed to have. There were some in Oz but they wanted serious money for them. It took me a couple of years to get a correct pair.
If the reflectors and lenses are good I'd suggest taking them apart and repairing them. The clips that hold the reflectors to the adjusters do break if someone has tried to over adjust them but I have some decent ones.