I have used quite a few of the ECS decals and other "goodies" on some cars that I have restored. I love, what I call, "little stupid details". When you pop the hood of a freshly restored car and you see little decals wrapped around the harness and battery cables... they are easy to overlook, but when someone notices them, it makes the car that much better.
Anyways Dave, to answer your question... if I were to choose between the NOS replacement Bees versus the "factory correct" repro Bees, I would go with the correct repros. Just out of curiosity, how much would each set run?