So just to be clear you gave pre facelift lights and a pre facelift rear bumper?
What happened to your facelift lights? It would be far easier to just fit a rear bumper and be done with it?
If you’re going the other way round you’ll need new light surrounds, new rear trim panel (that the bumper clips to) in addition to what you have. There is also a change in voltage, I think some stuff is 12v and this would need to be re-coded to 6v. Wiring isn’t a problem as these can be swapped easily.
I’ve gone the other way from pre to post and the 12v/6v thing is the hardest thing.
Also you’ll have to check the light fit the car because I had to modify the cut outs so that you could bolt the 3 light screws onto the car.