It's no hijack, the repulsive plastics are garbage. While the OP hasn't logged on in a while, we can all add some sort of options.
NOS fender extensions are expensive $$$ and are for the serious restoration project.
Replica Plastics are in my opinion garbage, and it's a fact that they have absolutely no customer service.
Then there is the VFN complete rear clip. Perfect for the drag racer and as you guessed, can be modified to accept tail lights. The bumper can be Alsa Wrapped with their chrome wrap, or can be cut out and a stock Mirada bumper can be used for a daily driver. The license plate recess is not as deep as the factory stock unit.
So to be honest, any fiberglass piece will require some work for proper fitting.